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Best Choice Maizoon 
Maizoon CNC Internal Lathe Threading Boring Bar Holder + 10Pcs 11IR A60 Inserts + T8 Wrench CNC Turning Tool Stainless S To reduce the tool grinding cost and improve the cutting efficiency.Best Value Gbtdoface 
Gbtdoface Carbide Insert,Lathe Boring Bar,Turning Tools Set,16mm S16Q-SCLCR06 Internal Lathe Boring Bar Turn Tool +CCMT0 【Internal Lathe Boring Bar】Made of durable and material, this internal lathe boring bar is designed for semi-finishing aMaizoon 
Maizoon CNC Tool Holders CLCR 6/7/8/10/12mm Lathe Boring Bar Set + 10pcs CCMT0602 Carbide Inserts + 5pcs Wrenches for La Good toughness and hardness, long service life.Maizoon 
Maizoon CNC Lathe Turning Tool Holder MGEHR1212-2 12 x 100mm Boring Bar + 10pcs MGMN200-G Carbide Insert High Hardness C Made of fine material with good durability.Domary 
Domary 21PCS Multifunctional Solid Carbide Inserts Holder Boring Bar with Wrenches for Lathe Turning Tools Good toughness and hardness, long service life.Maizoon 
Maizoon CNC Face Milling External Lathe Blade Holder Turning Boring Tool SRAPR1616H10 + 10pcs RPMT10T3MO Carbide Inserts High grip, impact resistance and strong, clear speed advantage, cut off bulk machining.Maizoon 
Maizoon CNC Lathe Holder Turning Tool Boring Bar 3pcs S07K-SCLCR06 S10K-SCLCR06 S12M-SCLCR06 + 10pcs CCMT0602 Inserts + Good toughness and hardness, long service life.Maizoon Maizoon CNC Tool Holders CLCR 10mm Lathe Boring Bar 7pcs Set + 7pcs Carbide Inserts + 7pcs Wrenches for Lathe Turning To High grip, impact resistance and strong, clear speed advantage, cut off bulk machining.Mingzhe Mingzhe S12MSCLCR09+SCLCR1212H09+SCLCL1212H09+SCMCN1212H09 4 PCS 12MM Shank Lathe Turning Tool Holder Boring Bar + 10PCS Superior steel, durable and wear-resistant, lengthen service time.Amgei Amgei 16mm Shank 7PCS With Carbide Insert Wrench DIY Set Metal Steel Lathe Boring Bar Holder Turning Tool Profiling bar for semi-finishing and finishing operations.Maizoon Maizoon CNC Lathe Groove Tool Holder MGEHR1616-3 16x100mm Boring Bar + 4pcs MGMN300 Carbide Insert High Hardness Cutter Made of fine material with good durability.CCJZBCAU Tool Holder Boring Bar Wrench Including 10 Pcs Carbide Inserts 1 Wrench SRACR1212H06 Professional Tool Holder Indexable [Package Includes] 10 Carbide Blades, 1 Wrench, 1 Bracket.Maizoon Maizoon External Lathe Tool Holder CNC Lathe Accessories WWLNR1616H08+WWLNL1616H08+10pcs 12MM Carbide Inserts+4pcs Wrenc External turning tools: the external turner is equipped with a detachable stainless steel ball bearing,which can be usedJoogto Joogto Indexable Lathe Turning Tool 21Pcs Kit 1/2'' 12mm Shank 7 Pcs Metal Lathe Tool Holder Set for Turning Grooving Th Complete Set: Our 7-piece turning tool set includes holders with installed C6 TiN Coated carbide inserts, insert screws,ASZLBYM ASZLBYM 3/4" Lathe Internal Boring Bar Turning Tool Holder S20R-MWLNR08 with Indexable Carbide Turning Insert WNMG432 [Package Included]: 1pc S20R－MWLNR08 boring bar + 10pcs WNMG080408 CNC inserts + 1pcs wrenchMaizoon Maizoon CNC Lathe Turning Tool Holder S20R-MWLNR08 Boring Bar + 10pcs WNMG0804 Carbide Insert +2 Hex Wrenches High Hardn High grip, impact resistance and strong, clear speed advantage, cut off bulk machining.18% Off Maizoon Maizoon CNC Internal Lathe Threading Boring Bar Holder WWLNR1616H08/WWLNR1616K08 16X100mm CNC Turning Tool+Wrench+WNMG08 Good toughness and hardness, long service life.Eacam Turning Holder, Eacam Tool Holder Indexable Boring Bar Wrench for Lathe Turning Tool with Carbide Insert 💖 Tool holder. 10 carbide inserts one set with a wrench.Maizoon Maizoon CNC Lathe Bit Tool Holder 4pcs S12M-SCLCR09 SCLCR1212H09 SCLCL1212H09 SCMCN1212H09 + 10pcs Carbide Inserts + 4pc High grip, impact resistance and strong, clear speed advantage, cut off bulk machining.LYMMIYTC 1/2" 12mm Indexable Lathe Turning Tool 21Pcs Kit- 7Pcs Metal Lathe Tools Holder Set with 14Pcs Carbide Insert Turning In All-in-One Kit:Our Indexable Lathe Turning Tool Set have 7Pcs different angled tool holders:SCLCR1212H06,SNR0012M11,SDJCVerRich VerRich Lathe Turning Tools,S12M SCLCR09/SCLCR1212H09/SCLCL1212H09/SCMCN1212H09 Boring Bar Turning Tool Holder With 10pc Package Includes:14PCS Indexable Metal lathe tools,with 4 pieces 1/2"12mm Shank Turning tool Holders (S12M-SCLCR09, SCLCRuilogod Ruilogod CPMT080208-MQ NX2325 1/10" Thick 4 Point Carbide Insert for Boring Bar(id:96 81e 9a c0a e0f Product Name : Carbide Insert;Grade : NX2325Gbtdoface Gbtdoface Toolholder Inner Hole Boring Tool Set,Carbide Inserts,S12M-SDUCR07 12mm Lathe Boring Bar Turning Tool Holder D 【Convenient Replacement】The tool holder is designed for user clamping and easy blade replacement with just a wrench. NoRuilogod Ruilogod CCM70602 1/10" Thick 4 Point Carbide Insert for Boring Bar Pakcage Content : 1 x Carbide InsertMGAVATPNPY MGAVATPNPY 1Pcs 16mm Shank MGEHR1616-3 Lathe Turning Holder Boring Bar with 10Pcs MGMN300 Inserts + Wrench for CNC Turni Easy to install, user-friendly, and easy to operate, widely usedFullFun FullFun 130PCS Metric Threaded Inserts Nuts for Wood, M4/M5/M6/M8/M10 Zinc Alloy Screw-in Nut Wood Inserts, Threaded Ins THREADED INSERTS ASSORTMENT KIT: M4 M5 M6 M8 M10 Threaded Inserts for Wood, external protrusions bite into the wood, proFullFun FullFun M2 M3 M4 M5 M6 (300pcs) Brass Threaded Inserts, Heat Set Insert, Metric Female Knurled Embedment Nuts for Plasti PACKAGE CONTENT: You will get 300pcs M2 M3 M4 M5 M6 3D printing threaded inserts 5 sizes, super large quantity can meetRuilogod Ruilogod CPMT090304-MO UC6025 4.5mm Thick 4 Point Carbide Insert for Boring Bar(id:d6 77d 25 534 70f Product Name : Carbide Insert;Grade : UC6025FullFun FullFun M2 M3 M4 M5 M6 (200pcs) Brass Threaded Inserts, Heat Set Insert, Metric Female Knurled Embedment Nuts for Plasti PACKAGE CONTENT: You will get 200pcs M2 M3 M4 M5 M6 3D printing threaded inserts 5 sizes, super large quantity can meetGluwoer Gluwoer Indexable Lathe Turning Tool 1/2" Shank 14PCS Kit-4PCS Metal Lathe Tools Holder 10PCS DCMT21.51 Carbide Insert f Material: The tool handle is made of high-quality 40Cr steel, which is high-strength and wear-resistant; the blade is maAINSTE CNC Carbide Lathe Turning Insert Tool Wood Turning Tool with Wood Carbide Insert Cutter Round Shank Woodworking Tool/Alu Can work with hand, convinient woodworking tool.Qingeer 3/8'' 10mm Indexable Lathe Turning Tool 27Pcs Kit- 9Pcs Metal Lathe Tools Holder Set with 9Pcs Carbide Insert Turning In All-in-One Kit: Our Indexable Lathe Turning Tool Set have 9Pcs different angled tool holders:SER1010H16, 1010H-2, SDNCN1Ruilogod Ruilogod VBMT160408 WN LT10 1/5" Thick 4 Point Carbide Insert Tool for Boring Bar Weight : 9g;Pakcage Content : 1 x Carbide InsertiCarbide iCarbide boring head set (CARBIDE INSERTS), Boring Bar, CARBIDE INSERTS R8 head includedFafeicy Fafeicy 100mm CNC Lathe Turning Tool, Lathe Turning Tool, Vane/Wing Insert Boring Bar Holder Vane/Wing Insert Boring Bar Tight tolerance and mismatched performance.Ruilogod Ruilogod CCMT09T304-V1 CT20 5/32" Thick 4 Point Carbide Insert for Boring Bar(id:ab c49 63 027 6bd Product Name : Carbide Insert;Grade : CT20Plyisty 13 PcsSet Boring Head CNC Milling Tools, F1-12mm 50mm Rough Boring Heads + MT3 -M12Morse Shanks W/10-125mm Boring Bars C Carbon steel material has strong stability, is not easy to , and has a long service life.Ruilogod Ruilogod CNMG120408-MA US735 1/5" Thick 4 Point Carbide Insert for Boring Bar(id:40 c37 eb 9a1 c7f Product Name : Carbide Insert;Grade : US735Snokay SNOKAY 230Pcs 11 Size M4/M5/M6/M8/M10 Metric Threaded Inserts Nuts Assortment Tool Kit Zinc Alloy Furniture Bolt Fastene Package Includes: You will get 230 pcs furniture hex drive nuts in total, including m6*15 mm - 12 pcs, m8*15 mm - 10 pcsAcbbMNS AcbbMNS 20Pcs M8 x 20mm Threaded Inserts Nuts Furniture Screw in Nut Wood Inserts Bolt Fastener Connector Hex Socket Dri 【Material】This threaded inserts for wood are made of high quality galvanized iron, hardness of high resistance to rust,AcbbMNS AcbbMNS 20Pcs M8 x 20mm Threaded Inserts Nuts Furniture Screw in Nut Wood Inserts Bolt Fastener Connector Hex Socket Dri 【Material】This threaded inserts for wood are made of high quality galvanized iron, hardness of high resistance to rust,Swpeet Swpeet 50Pcs M6×15 Zinc Plated Threaded Insert Nuts, Hex Drive Threaded Inserts, Internal Threads Fastener Connector, Wo 🌟 What You Get --- In this kit,you will get 50Pcs M6×15 Zinc Plated Threaded Insert Nuts. Meet your furniture repair neMotiveTech MotiveTech Indexable Turning Tool Insert Holder Set Metal with 10 Ccmt060204 Inserts, for Boring, 【Durability】Inserts feature coating, offering hardness, wear resistance, and heat dissipation for both continuous useGeneric lathe tools, SCLCR06 Shank Lathe Turning Tool Holders (6-10mm)-10pcs Inserts+Boring Bar Cutter(10pcs Insert) Complete Set with Easy Replacement , ensuring you have the right tools for your machining needs. The set provides ampleANKROYU ANKROYU Lathe Boring Bar, Hard Steel Turning Tool Holder with 2 Wrench, Lathe Boring Bar Attachment, Lathe Bore Internal 【Enhanced Processing Efficiency】This tool is designed to help you process products with improved efficiency. ExperienceGeneric lathe tools, SCLCR06 Shank Lathe Turning Tool Holders (6-10mm)-10pcs Inserts+Boring Bar Cutter(S07K-SCLCR06 Bor Bar) Complete Set with Easy Replacement , ensuring you have the right tools for your machining needs. The set provides ampleGeneric Lathe Tool， SRACR1212H06 Indexable Turning Tool Set Boring Bar+10 Carbide Inserts+Wrench ，for lathes Wide range of uses: The inserts are made of carbide, making our turning tools suitable for a wide variety of materials i3DZWMAN 1/4-20 Threaded Inserts with 8PCS Heat Set Insert Tools,Brass UNC knurled Nuts for 3D Printing Components and Plastic Pa In 3D Printing, heat-set brass inserts with knurled surfaces are pressed into 3D-printed parts to create strong, reusablGeneric lathe tools, SCLCR06 Shank Lathe Turning Tool Holders (6-10mm)-10pcs Inserts+Boring Bar Cutter(S06K-SCLCR06 Bor Bar) Complete Set with Easy Replacement , ensuring you have the right tools for your machining needs. The set provides ampleXEBQWDSA SRACR1212H06 Indexable Turning Tool Set Boring Bar+10 Carbide Inserts+Wrench 12mm indexable turning tool set: boring bar, 10 carbide inserts, 1 wrench, SRACR1212H06 tool holder.YQkangzhu YQkangzhu 300Pcs Threaded Inserts M2+M3+M4+M5+M6 Assortment Box, 3D Printing Components Brass Nuts, Female Knurled Threa Material: Crafted from brass material, which ensures optimum corrosion resistance and thermal conductivity. This means tXEBQWDSA SRACR1212H06 Indexable Turning Tool Set Boring Bar+10 Carbide Inserts+Wrench 12mm indexable turning tool set: boring bar, 10 carbide inserts, 1 wrench, SRACR1212H06 tool holder.Generic lathe tools, S06K/S07K/S08K/S10K-SCLCR06 Lathe Boring Bar+10 CCMT060204 Inserts+4 Wrenches Complete Set with Easy Replacement , ensuring you have the right tools for your machining needs. The set provides ampleGeneric Lathe turning tools, SCLCR06 Shank Lathe Turning Tool Holders (6-10mm)-10pcs Inserts+Boring Bar Cutter ，for parts(10pcs Accuracy and stability: Our lathe cutting tools have undergone strict quality control to ensure consistent dimensions anSxhlseller Heat Set Insert Tips for M2 M2.5 M3 M4 M5 M6 Inserts, Brass Threaded Insert Embedment Nuts Hydraulic Welded Joint Inject 3D PRINTER PARTS: 3D printer soldering tips are commonly used for 3D printers to print parts with hot melt copper nuts oXEBQWDSA SCLCR06 Shank Lathe Turning Tool Holders (6-10mm)-10pcs Inserts+Boring Bar Cutter(S07K-SCLCR06 Bor Bar) SCLCR06 shank lathe turning tool holders with 6/7/8/10mm metal rods.XEBQWDSA SCLCR06 Shank Lathe Turning Tool Holders (6-10mm)-10pcs Inserts+Boring Bar Cutter(S06K-SCLCR06 Bor Bar) SCLCR06 shank lathe turning tool holders with 6/7/8/10mm metal rods.Generic Lathe turning tools, S06K/S07K/S08K/S10K-SCLCR06 Lathe Boring Bar+10 CCMT060204 Inserts+4 Wrenches ，for parts Accuracy and stability: Our lathe cutting tools have undergone strict quality control to ensure consistent dimensions anXEBQWDSA SCLCR06 Shank Lathe Turning Tool Holders (6-10mm)-10pcs Inserts+Boring Bar Cutter(S10K-SCLCR06 Bor Bar) SCLCR06 shank lathe turning tool holders with 6/7/8/10mm metal rods.HIHHOOU Lathe Turning Tool 4Pcs 7/8/10/12mm SCLCR06 Lathe Boring Bar Turning Tool With 10pcs CCMT0602 Inserts Right hand internal boring bar,95°approach angle for boring and facing cuts.Generic carbide inserts, 10Pc/set MW0804 Shims - Carbide Insert Boring/Trigon Turning Replacement Parts,For lathes High quality turning insert,design for stainless steel & steel,sharp and wear-resistant, smooth chip evacuation Used forMultiple. Distributed through American National Standards Institute (ANSI) ISO 5609:1998, Boring bars for indexable inserts - Dimensions Swpeet Swpeet 122Pcs White Zinc Plated Carbon Steel Carbon Furniture Screw in Nut Threaded Wood Inserts Threaded Inserts Bolt F 【 Perfect Inserts Nut Assortment Kit 】------ Threaded inserts for wood are used for pre-embedded connectors for wood furGeneric threading tool, 10Pc/set MW0804 Shims - Carbide Insert Boring/Trigon Turning Replacement Parts,for replacement insert Advantage: Wear-resistant and heat-resistant, not easy to stick to the holders or workpieces or break up.Vacuum hardeninMultiple. Distributed through American National Standards Institute (ANSI) ISO 6261:1995, Boring bars (tool holders with cylindrical shank) for indexable inserts - Designation Generic Lathe turning tools, SRACR1212H06 Indexable Turning Tool Set Boring Bar+10 Carbide Inserts+Wrench ，for parts Accuracy and stability: Our lathe cutting tools have undergone strict quality control to ensure consistent dimensions anMEIRINJS MEIRINJS 1pcs 13mm SNR0013M16 CNC Lathe Internal Threading Boring Bar Turning Tool Holder With 10pcs 16IR AG60 Carbide t SNR0013M16 Size : overall length : 150mm=5.9inch , shank diameter : 13mm=0.51inch, cutting direction : internal thread rAuoeer Tools MGMN300 Carbide Insert for MGEHR1212-3 Holder Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools MGMN300 Carbide Insert for MGEHR1212-3 Holder Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools MGMN300 Carbide Insert for MGEHR1212-3 Holder Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.DSweCByu Lathe Turning Tool 95° Lathe Boring Bar 7/10/12/16/20mm SCLCR 06/09 Turning Tool Holder+CCMT Insert Blades For Machine Profiling bar for semi-finishing and finishing operations.Auoeer Tools MGMN300 Carbide Insert for MGEHR1212-3 Holder Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools 10pcs Carbide Inserts TCMT16T304 for Indexable Boring Bar Turning Tool Holder Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools 1 Set Black Lathe Turning Tool Holder 5pcs S10K/S07K/S12M-SCLCR06 S16Q/S20R-SCLCR09 Lathe Turning Tool Holder 7/10 High grip strength, impact resistance and strong, clear speed advantage in cutting off a large margin and processing;Auoeer Tools 10pcs Carbide Inserts TCMT16T304 for Indexable Boring Bar Turning Tool Holder Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools 10pcs 11IR A60 Carbide Insert for Turning Tool Holder Boring Bar Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Nikovoke Knurled Nuts Thread Lnsert, 25Pcs Brass Double Hole 1/4x6x8mm, Threaded Insert Nuts 3D Printing、 Wood with Bolts、Plastic 【Double hole design】Provide dual positioning benchmarks to achieve quick alignment, reduce installation deviation, and aFullFun FullFun 95PCS Metric Threaded Inserts Nuts for Wood, M6/M8/M10 Carbon Steel Screw-in Nut Wood Inserts, Threaded Inserts THREADED INSERTS ASSORTMENT KIT: M6 M8 M10 Threaded Inserts for Wood, external protrusions bite into the wood, providingAuoeer Tools 10pcs Carbide Inserts Carbide Cutter for Turning Tool Boring Bar CCMT060204 LF6018 Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Marhynchus M6 Threaded Inserts 120pcs Assorted Kit Zinc Alloy Wood Nut Insert Nuts Set Hex Drive Nut Threaded Insert for Wood Proje [User-friendly Design] These multipurpose insert nuts can be effortlessly driven with a hex key wrench, making them simpAuoeer Tools S20R-MWLNR08 Lathe Boring Bar Turning Tool Holder with 10pcs WNMG080404 Insert Drill Chuck Lathe Turning Tool Boring Bar HolderGeneric Turning inserts, 10Pc/set MW0804 Shims - Carbide Insert Boring/Trigon Turning Replacement Parts,replacement Versatile Material Compatibility: machining steel, cast iron, stainless steel, aluminum, and other non-ferrous materialsSAHENITEANA SAHENITEANA 130 Pcs Metric Threaded Inserts Nuts for Wood, M4/M5/M6/M8/M10 Zinc Alloy Screw-in Nut Assortment Tool Kit f 【High Quality Material】These Female thread knurled nuts are made of durable brass with excellent rust resistance and oxiAuoeer Tools 10pcs Inserts Carbide Turning Inserts TNMG160402R Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools 10pcs Inserts Carbide Turning Inserts TNMG160402R Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools 10pcs Inserts Carbide Turning Inserts TNMG160402R Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools 10pcs 16ER 24UN SMX35 Carbide Inserts for SER Turning Tool Holder Boring Bar Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.XEBQWDSA 10Pc/set MW0804 Shims - Carbide Insert Boring/Trigon Turning Replacement Parts 10Pc/set shims, designed as replacement parts for carbide inserts and boring tools.TopHomer 10Pcs Carbide Tips Inserts, CNC Lathe Turning Milling Inserts for Stainless Steel Processing - DCMT070204 US735 DCMT21.5 【Material】The turning tool adopts high-quality carbide head, with exquisite craftsmanship and high hardnessAuoeer SRAPR2020K10 Turning Blade Holder Tool Holder Boring Bar Lathe for RPMT10T3 Insert Boring Inserts Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Jectse 50Pcs Threaded Inserts,Self Tapping Thread Insert,Repair Thread Tool,for Entire Metal and Plastics Processing Industry. Due to self-tapping ability, the base material does not have to be tapped in advance.Due to self-tapping ability, the baAuoeer 10pcs Inserts CNC Lathe Blade MGMN500-M NC3030 Boring Inserts Tools Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer 10pcs Inserts CNC Lathe Blade MGMN500-M NC3030 Boring Inserts Tools Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools 10pcs R5 Carbide Insert Milling Threading Insert for Turning Tool Holde Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer 20pcs 16IR AG60 16ER AG60 Carbide Inserts Internal External Thread CNC Blade Boring Inserts Tools Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools 10pcs DCMT070202 Carbide Inserts for SDJCR1010H07 Turning Tool Holder Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools Carbide Tips Inserts Turning Tool Holder Carbide Inserts 10pcs TNMG 160404 Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools 10pcs DCMT070202 Carbide Inserts for SDJCR1010H07 Turning Tool Holder Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools 10pcs Carbide Insert CCGT060204-AK H01 Inserts CNC Turning Tool Used for Aluminum Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.Auoeer Tools CCMT060204 VP15TF Carbide Insert 10pcs for SCLCR Turning Tool Holder Boring Inserts Drill Chuck Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.