Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant's customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. As an Amazon Associate we may earn from qualifying purchases. We may receive a commission from purchases made through links on our site, which will help us continue to provide you with value.
Best Choice SHDIATOOL 
SHDIATOOL Turbo Row Diamond Grinding Cup Wheel for Concrete Granite Marble Masonry Brick Diameter 5"/125mm Diameter 5 inch/125mm,Bore 22.23mm,Grits 30-40SHDIATOOL 
SHDIATOOL Turbo Row Diamond Grinding Cup Wheel for Concrete Granite Marble Masonry Brick 4-1/2 Inch/115mm Diameter 4.5 inch/115mm,Bore 22.23mm,Grits 30-40Best Value Yosoo 
Concrete Grinding Wheels, High Concentration Diamond Cup Grinding Wheel Long Service Life for Granite (125mm) Increase Durability: Large grinding section and heat treated steel body, which can increase durability and wheel lifeYosoo Concrete Grinding Wheels, High Concentration Diamond Cup Grinding Wheel Long Service Life for Granite (125mm) Increase Durability: Large grinding section and heat treated steel body, which can increase durability and wheel lifeJUNLIXN 
𝐉𝐔𝐍𝐋𝐈𝐗𝐍 3 Pcs Mounted Stone Grinding Wheels with 1/4-Inch Shank 40mm/50mm/60mm Diameter Abrasive Stone Grinding W 【Materiasl】Grinding wheels are made of premium aluminum oxide for sharpening/grindingECSiNG 
ECSiNG 20pcs 1/8inch Grinding Stone Wheels with Connecting Rods 20x3mm Compatible with Dre-Mel Rotary Tools Product Dimensions: Grinding wheel diameter 20mm, thickness 3mm, shank diameter 3mm (1/8 inch). Manual measurements, plemoresuperhard 
MORESUPERHARD CBN Grinding Wheel 8 inch 180 Grit,1" Wide,5/8" Arbor,Suitable for All Kinds of 8 inch Bench Grinders,for 【Accurate Size】:8 inches in diameter, 1 inch wide, 5/8 inch bore, 180 grit. Accurate size, perfectly matched with your b11% Off lehom lehom Double-Row Diamond-Cup Grinding-Wheel Concrete Grinding Cup Wheel Disc Concrete Masonry Stone Grinding Wheel (125M High quality and brand new diamond segment grinding wheel cuplehom lehom Double-Row Diamond-Cup Grinding-Wheel Concrete Grinding Cup Wheel Disc Concrete Masonry Stone Grinding Wheel (125M High quality and brand new diamond segment grinding wheel cupAuto-plaza Auto-plaza 2Pcs 0.8/1.0mm Roll Wheels Knurled Groove Wire Feed Drive Rollers 25mm (1 inch) Diameter Fit for SSJ16 Wire F Material: High Quality Steel.ERDANER 1 Piece Deburring Wheel, Bench Top and Base Grinding Wheel, 5", Suitable for Various Alloy Steels, Hardened Steels,Etc. Function: The grinding wheel is designed for grinding high-hardness metals like carbon steel and alloy steel.uxcell uxcell 5-Inch Bench Grinding Wheels White Aluminum Oxide WA 80 Grits Surface Grinding Ceramic Tools HIGH GRINDING rate - High hardness, sharp edges and corners, good cutting performance and low grinding heat.Tbest Tbest Cup Grinding Wheel for Concrete and Stone - Double Row Design for and Marble (180mm) Reduced Wear: Cup Grinding Wheel features strategically placed air holes that enhance cooling and minimize wear during pBriny River Briny River Bench Grinding Wheel Diamond Grinding Wheel with 1/4 Inch Shank for Wood Metal Threaded Repair Tungsten & La Product size: The diameter of the diamond grinding head is 1.78 inches, the hole diameter is 1/4 inch, the diameter of t37% Off POWERTEC POWERTEC Bench Grinder Wheel 6 Inch 150 Grit, Aluminum Oxide Grinding Wheel for Bench Pedestal Grinder, 3/4" Thick 1/2" VERSATILE 150 GRIT ALUMINUM OXIDE Wheel – Our 6 inch grinding wheel offers an ideal balance between material removal andAcbbMNS AcbbMNS 10 Pack 5" x 1/4" x 7/8" Depressed Center Metal Grinding Discs Wheels for Angle Grinders 5" Inch Diameter x 1/4" Inch Thickness x 7/8" Inch Arbor, Depressed center metal grinding disc for aggressive grinding aZDETGU ZDETGU 7.3cm Brazed Grinding Wheel Concave Abrasive Wheel for Stone Ceramic Glass High Efficiency and Longevity Our brazing process enhances efficiency and extends the lifespan of these grinding wheels,POWERTEC POWERTEC 15505 White Aluminum Oxide Grinding Wheel, 8-Inch by 1-Inch, 5/8-Inch Arbor, 120 Grit INCLUDES: (1) Bench Grinder Grinding Wheel w/ vitrified bondSEIWEI 10 x Pink Grinding Wheels 6mm T-Shaped Shank, 25mm / 30mm / 40mm Grinding Stone Polishing Wheel for Rotary Tools High hardness, durable, not easy to wear;UF-SHARP UF-SHARP 250mm CBN Grinding Wheel for Tormek T-8 Sharpening System, 250mm Diameter, 50mm Width, 12mm Hole (Round Angle, 【Applicable models】UF-SHARP CBN Grinding Wheel is compatible with Tormek T-7、Tormek T-8 、WEN BG4270、JET JBG-10B grindersDremel Dremel EZ541 EZ Lock Grinding Wheels Accessory Set, 2 Reinforced Grinding Wheels for Grinding and Sharpening Metals Comprehensive offering for general purpose to specialized high performance applicationsdmsphd CBN Grinding Wheel for Sharpening, 10 Inches Diameter, 12mm Arbor Fitment, Tormek Compatible (600 Grit) Precision Diamond Wheel: 10-inch diameter CBN wheel for grinding tools and knives to a very fine edge. Features a 12mm aLITTLE BALANCE LITTLE BALANCE 8761 Savoyarde 1/4 grinding wheel Meuuuh…!, Traditional quarter grinding wheel, 4 people, Sliding cheese Traditional raclette machine for continuous heating of a quarter of a cheese grinding wheel, for an authentic and friendキング砥石 King wheel King Deluxe fine for cutlery grinding standard in finishing for 800 (DX-800). Medium-coarse (Grit 800) whetstone hones knife edgesSKLZ 4.5 inch (115mm) PCD Grinding Cup Wheel with 6 PCD Segments 7/8 inch Arbor for Removing/Grinding Off Epoxy/Asphalt Surfa PCD Segment made from High Grade Diamond Micron powder , which is durable and aggressive.Ruimou Ruimou 16mm, 20mm Flap Wheels for Grinding, 1/4 Inch Shank Flap Wheels for Drill Removing and Polishing Rust Paint,80 Gr 1.Package Content: 20pcs in total (10PCS x 16 mm Flap Wheels, 10PCS x 20 mm Flap Wheels); Grit materials: 80 Grit, R.P.MRuimou Ruimou 16mm, 20mm Flap Wheels for Grinding, 1/4 Inch Shank Flap Wheels for Drill Removing and Polishing Rust Paint,80 Gr 1.Package Content: 10pcs in total (5PCS x 16 mm Flap Wheels, 5PCS x 20 mm Flap Wheels); Grit materials: 80 Grit, R.P.M MAsixxsix Asixxsix 3 Spoke Hand Wheel, 125mm Diameter Cast Iron Lathe Handwheel with Revolving Handle, Handwheel for Milling Machi SPECIFICATIONS: 3 spoke lathe hand wheel, the product outer diameter is 125mm, the mounting hole inner diameter is 12mm,moresuperhard MORESUPERHARD CBN Grinding Wheel 6 inch,320 Grit,1/2" Bore,1" Wide,Compatible with All Kinds of 6 inch Bench Grinders,fo 【Accurate Size】: 6 inches in diameter, 1 inch wide, 1/2 inch bore, 320 grit. Accurate size, perfectly matched with yourGeneric Nylon Fiber Wheel Abrasive 3'' Replacement Grinding Wheels for Bench High quality material, durable, long service lifeGeneric CBN Grinding Wheel 10 inch for Tormek T8 Cubic Boron Nitride Sharpening Wheels 250mm for Knife Industry 250mm Dia x 50mm [Application]: This CBN Grinding Wheel is especially suitable for Tormek T7 and T8 grindersAmaCupid AmaCupid Bench Grinding Wheel 6 inch, Green Silicon Carbide Abrasive. for Sharpening Carbide Tools, Products of Non-Meta Application: Green silicon carbide grinding wheel is suitable for grinding non-ferrous metals such as carbide tools andKUNLONGSKY 40Pcs 2 in Roll Lock Flap Discs with 1/4inch Holder Die Grinder Attachments 40/60/80/120 Grit Grinding Wheels QUICK CHANGE: The abrasive sanding discs torque spiral allows to replace disc quickly. They combine premium quality sandGeneric CBN Grinding Wheel 8" Diameter, 5/8" Bore, 1.5" Wide,Aluminum Body,HSS Woodturning Tools (Grit Size 180) 【CBN Grinding Wheel】: Our CBN wheels are made with Electroplate Method to hold Cubic Boron Nitride grain onto a preciselTopHomer 10 x Pink Grinding Wheels 6mm T-Shaped Shank, 25mm / 30mm / 40mm Grinding Stone Polishing Wheel for Rotary Tools High hardness, durable, not easy to wear;AB Tools 6" (150mm) Coarse Grinding Wheel Bench Grinder Stone 36 Grit 19mm Thick TE864 iplusmile iplusmile 2sets Grinding Wheel Spindle Motor Arbor Motor Shaft Attachment for Bench Grinder Polishing Wheel Holder : this grinding wheel attachment ensures efficient and grinding performance,grinding shaft,grinding wheel attachmentCQJJTKX Angle Grinding Wheel, High Strength Diamond Cutting Wheel Blade, 4 1/2" /5"/7" Electroplated Diamond Grinding Wheels for Superior Materials and Precise Sizes: This multi-functional grinding and cutting disc is made of high-quality electroplaPOWERTEC POWERTEC 15516 Bench and Pedestal Grinding Wheels, 8 Inch x 1 Inch, 5/8 Arbor, 36 Grit, Aluminum Oxide Bench Grinder Whe INCLUDES: 8” Aluminum Oxide Grinding Wheel w/ 36 gritFaithfull Faithfull Grinding Wheel Bore Reducing Set of 31.75mm - 12.7mm Wheel Dressers & Grinding WheelsTOPEX 50-Piece 85mm Professional Cutting Wheels Discs Premium Grinding Wheel 2 in 1 Steel INOX Ultra Thin Formulated for angle grinders, ultra-thin cutting wheelFENGLDX Bench Grinder Wheels, White Corundum Grinding Wheel 200mm OD 32mm Hole 20mm Thick Multiple Grits(100 Grit) USER EXPERIENCE: During the grinding process, the grinding heat generated by the sharpening wheel is relatively small, aPOWERTEC POWERTEC 15518 Bench and Pedestal Grinding Wheels, 6 Inch x 3/4 Inch, 1/2 Arbor, 80 Grit, Aluminum Oxide Bench Grinder W INCLUDES: 6” Aluminum Oxide Grinding Wheel w/ 80 gritDEWALT DEWALT DW4523 4-1/2-Inch by 1/4-Inch by 5/8-Inch General Purpose Metal Grinding Wheel High performance aluminum oxide grain for long life and high material removal of the grinding wheelYakamoz Yakamoz Abrasive Wheel,40Pcs 1.0-inch/ 25mm Abrasive Wheel Buffing Polishing Wheel Set Polishers Buffers Tool Kit for Ro SIZE - Shanks are 1/8 inch (3mm), buffing wheels are 1.0-inch in diameter, 25mm abrasive wheelIEKDILDSK 1PC Diamond Grinding Wheel Vacuum Brazed Demi-bullnose Edge Profile Diameter 3 Inches/75mm Grinding Disc Diamond Wheel(1 Made of cemented carbide, it has high hardness and strong wear resistance. It can handle the grinding of various materiaＡＷＨＡＯ ＡＷＨＡＯ Nylon Fiber Wheel 3'' Replacement Grinding Wheels for Grinder Effectively the drawing line, high finish, good effectUF-SHARP CBN 4 in 1 Grinding Wheel, 8" Dia x 1.25" Wide x 5/8" Bore for Sharpening Woodturning Tools、High Speed Steel Tools (320 【4-in-1 Design】: This unique CBN Radius Wheel has the addition of a 1/4" radius on both edges for sharpening hollowing tEDiamondTools Grinding Wheels for Concrete and Masonry 4.5" Diameter 18 Turbo Diamond Segments 5/8"-11 Arbor #30/40 diamond grit for long-lasting grinding concrete and masonrySealey Sealey SMS2008.10 Grinding Wheel for SMS2008, Silver Features:Grinding wheel for Model Nouxcell uxcell 5-Inch Bench Grinding Wheels Green Silicon Carbide GC 80 Grits Surface Grinder Ceramic Tools STRONG STABILITY - Made of green carborundum, with high hardness and the shape reminds well.OFFROAD MALL AM 2 Pack Replacement Grinding Wheels/Heads/Bits for Casfuy All Models (Except N70, N75, N90), LuckyTail and Most Brands' C Optimal 40# Grit Scale: Designed Specifically for Large Pets with Thick, Tough Nails, such as DACHSHUND, Mini Schnauzer,AcbbMNS AcbbMNS 30 Pack 5" x 1/4" x 7/8" Depressed Center Metal Grinding Discs Wheels for Angle Grinders 5" Inch Diameter x 1/4" Inch Thickness x 7/8" Inch Arbor, Depressed center metal grinding disc for aggressive grinding alehom lehom Leveling Casters Wheels 4 Pack Industrial Machine Swivel Caster Wheels 80F Heavy Duty Plate Mounted Leveling Machi Durable and Wear Resistant: The lehom leveling caster wheel is made of thickened aluminum alloy, rubber base and nylon wSHDIATOOL Double Row Diamond Surface Grinding Cup Wheel Diameter 5" 2pcs 2pcs Diameter 5 inch/125mm,Bore 22.23mm,Grits 40-50;Segment size 5mm thicknessEinhell Einhell Grinding wheel TC-BG 150 B (350 W max, grinding wheel Ø 150 mm), with accessories APPLICATIONS - The TC-BG 150 B Einhell Grinder is a robust tool for versatile use including sharpening scissors, knivesuxcell uxcell 5-Inch Bench Grinding Wheels Aluminum Oxide a 60 Grits Surface Grinding Ceramic Tools STRONG STABILITY - Made of corundum, with high hardness and the shape reminds well.UF-SHARP UF-SHARP CBN Grinding Wheel 8 inch 80 Grit, 1" Wide, 5/8" Arbor, Suitable for All Kinds of 8-inch Bench Grinders (80 Gri 【Size】: 8 inches in diameter, 1 inch wide, Bore 5/8 inches, 80 grit, full nickel platedlabwork 4.5inch x 7/8inch Abrasive Grinding Wheel, Flap Wheel, 80 Grit T29 Grade Zirconia, for Die Angle Grinder Grinding Wood, Performance Upgrade --- Our 4.5-inch grinding wheel features thicker abrasive cloth and more durable abrasive particles,HighFree HighFree 14PCS 2-in-1 Mounted Flap Wheels & Non-Woven Wheels Set, Coarse 80 Grit 7 Sizes with 1/4" Shank for Drill, Meta Durable Material Quality: Crafted with alternating premium aluminum oxide paper and coated non-woven abrasive, the wheelWA GRINDER 10PACK - 4 1/2"×1/8"×7/8" Flexible Grinding Wheel for Metal, 4 1/2" Diameter, 1/8" Thickness, 7/8" Arbor, Grit 60 Depres HIGH QUALITY - High-grain concentration for aggressive grinding action and smoothly running wheels. More flexibility thadmsphd CBN Grinding Wheel 8 inch 600 Grit, 1.25" Wide, 5/8" Bore,Aluminum Body, Suitable for High Speed Steel Tools and Bench G 💯【SIZE】: 8 inches diameter, 1.25 inch thickness, 5/8 inch bore,600Grit, all aluminum.XINGXIN 6 inch CBN Grinding Wheel Disc Bowl Shape Resin Bond for High-Speed Steel Grinding (Grit:180#) Grit:180# ,bowl shape resin bond for general grindingDEWALT DEWALT DW4624 6-Inch by 1/4-Inch by 7/8-Inch General Purpose Metal Grinding Wheel (1-Pack) High performance aluminum oxide grain for long life and high material removalAcbbMNS AcbbMNS 20 Pack 5" x 1/4" x 7/8" Depressed Center Metal Grinding Discs Wheels for Angle Grinders 5" Inch Diameter x 1/4" Inch Thickness x 7/8" Inch Arbor, Depressed center metal grinding disc for aggressive grinding a3M 3M Silver Depressed Center Grinding Wheel, 87446, T27 Quick Change, 5 in x 1/4 in x 5/8 in-11, Pack of 10, Deburring Edg HEAVY-DUTY PERFORMANCE: Our product is specifically designed for heavy grinding, beveling, and weld removal, making it iDEWALT DEWALT Flap Wheel, 3-Inch x 1-Inch x 1/4-Inch HP, 120-Grit (DAFE1H1210) 3" X 1" X 1/4" HP 120G FLAP WHEELTorSor TorSor 2 Pack 3'' Rotary Grinding Stone Mounted Stone Grinding Wheels with 10mm 3/8-Inch Shank 70mm Diameter Abrasive St Package Included: 1 X Polishing wheel with Conversion Rod + 2 X Polishing wheelTruePower TruePower 02-8321 Grinding Wheel Dresser Six replaceable hardened star-toothed cuttersDA-HUA 6mm Thick Metal Grinding Disc, Outer Diameter 230mm + Inner Diameter 22 mm , 5 Layer, Grinding Wheels, Cutting Wheels fo Grinding Wheels for Grinding All Metal, Steel, Stainless Steel, Iron welds, Hard Alloys etc.uxcell uxcell Grinding Wheel 5 Inch 120 Grits Aluminum Oxide Cup Abrasive Wheels, White Corundum for Hardened Steel, Grinding M Size - Granularity: 120 Grits, Outer Diameter: 125mm / 4.92inch, Inner Diameter: 32mm / 1.26inch, Height: 63mm / 2.48incGeneric 4 in 1 Plus CBN Grinding Wheel 8" Diameter, 5/8" Arbor,1.5" Wide with 1/4" Radius,1" Down The Side,for Sharpening Woodtu 【Design & Size】: 4-in-1 PLUS design,8 inch diameter, 1.5 inch wide with 1/4 inch Radius, 5/8 inch arbor, 1 inch Down thePRETEC Grinding Cutting Wheels 5 inch Set - PRETEC 5" 20 Cut Off Wheels, 3 Grinding Wheels, and 3 Flap Discs for Angle Grinder 26pcs Angle Grinder Disc 5 inch & 3 Different Types : ✅ The 26 packs angle grinder wheels 5 inch including 20 Packs 5"x1Abbot & Ashby 3 x Abbott & Ashby 200mm 8" Grinding Wheel/Disc Bench Grinder Silicone Carbide Metal Steel Plastic Glass 80 Grit (3 x Gr Grinding wheel to suit 200mm bench grindersNorton Norton Grinding Wheel, Premium Blue Bench and Pedestal Ceramic Alumina Bench Grinder Wheel, 8 Inch Grinding Wheel, Pack Norton Premium Blue Bench and Pedestal Grinder Wheels are developed with ceramic alumina and a high-performance bond thaSpacnana 2Pcs Tungsten Buffing Wheels Polishing Wheel 42mm And 55mm With 6mm Shank For Metal Grinding And Shaping [HIGH-SPEED OPERATION]: The bowl-type grinding head runs at a fast speed of up to 20000 rpm, allowing for efficient andUF-SHARP UF-SHARP CBN Grinding Wheel 6 inch 1/2 Arbor 80 Grit, 6" Dia X 1" Wide for Sharpening Woodturning Tools、High Speed Steel 【Size】Diameter: 6 Inch, Arbor Hole: 1/2 Inch, Thickness: 1 Inch, Grit 80.DEWALT DEWALT DW4550 9-Inch by 1/4-Inch by 5/8-Inch-11 High Performance Fast Metal Grinding Wheel 9inches X 1/4inches X 5/8inches -11 FAST Cut ABRFaithfull Faithfull - General Purpose Grinding Wheel 200 x 20mm Fine Alox Faithfull aluminium oxide vitrified grinding wheels are suitable for use on most types of bench grinders and are suitablXINGXIN 7" inch PCD Grinding Wheel 9 Segments for Remove Epoxy Glue Mastic Paint and Concrete Floor Surface Coating with 5/8"-11 Diameter:7", 9 PCD segments,5/8"-11 ThreadFaithfull Faithfull FAIGW20020M Bench Grinding Wheel Alox 200mm x 20mm Medium Faithfull aluminium oxide vitrified grinding wheels are suitable for use on most types of bench grinders and are suitablEASGIU EASGIU CBN Grinding Wheel, 8 Inch Dia x 1 Inch Wide x 5/8 Inch Bore for Sharpening Woodturning Tools, High Speed Steel T ✅ 【Suitable Size】8 inches in diameter, 1 inch wide, Bore 5/8 inches, 600 grit stainless steel body, smoother, does not rTruswe Truswe Grinding Wheels 5 Pack, Grinding Discs 4 1/2 for Angle Grinder, Aggressive Grinding for Metal, Stainless Steel, S 👷️ 【QUANTITY&PERFECT SIZE】A pack of 5 pieces grinding wheels. Perfectly compatible with all 4-1/2 inch(115mm) angle griPOWERTEC POWERTEC 15522 Bench and Pedestal Grinding Wheels, 8 Inch x 1 Inch, 5/8 Arbor, 100 Grit, Aluminum Oxide Bench Grinder Wh INCLUDES: 8” Aluminum Oxide Grinding Wheel w/ 100 gritPOWERTEC POWERTEC 15554 Bench and Pedestal Grinding Wheels, 8 Inch x 1 Inch, 5/8 Arbor, 2 Pack, 150 Grit A/O and 120 Grit White A INCLUDES: Aluminum Oxide Grinding Wheel (1) 150 Grits & (1) White 120 Grits w/ vitrified bondZerodeko Zerodeko Grinding Wheel Arbor Adapter Kit 8mm Inner Hole Polishing Wheel Spindle Extension Shaft for 775 Electric Motor Precision engineering: the connecting rod is designed to provide stable rotational speed and precise grinding, enhancinguxcell uxcell 8-Inch Bench Grinding Wheels Green Silicon Carbide 60 Grits Surface Grinding Ceramic Tools STRONG STABILITY - Made of green corundum, with high hardness and the shape reminds well.Benchmark Abrasives Benchmark Abrasives Grinding Wheels 4 1/2 Inch Arrow Type Diamond Cup Wheel with 5/8"-11 Arbor Hole for Masonry, Natural FASTER GRINDING WHEEL: The Benchmark Abrasives 4 1/2” Arrow Type diamond cup wheel, speed ups your grinding tasks on graOregon Oregon OR534-18A Grinding Wheel, 5-3/4-Inch by 1/8-Inch,Purple Resists burning of the cutters and leaves a precision finishGeneric Generic CBN Grinding Wheel, 1" Wide, Accessory, High Compressive Strength, 180 Grit, 5/8" Shank 【Operate Speed】: Even when operated on the most common grinders this wheel can perform the most accurate grinding tasks.Z-LION Z-LION 2" Diamond Drum Wheel Vacuum Brazed Grinding Sanding Wheel with 5/8-11 Thread for Stone Sink Hole Edge SPECIFICATIONS: Coarse grit 30/40, Diameter 2", Segment Length 3.58", 5/8"-11 spindlesUS Forge US Forge 744 Mounted Grinding Wheel, 2-1/2-Inch by 1/4-Inch Mounted grinding wheels feature 1/4-Inch - diameter shankDEWALT Dewalt 6 In. X 1/4 In. X 5/8 In. To 11 High Performance Metal Grinding Wheel High performance aluminum oxide grain for long life and high material removalAcbbMNS AcbbMNS Cut Off Wheels 10 Pack, 100mm x 6mm x 16mm Depressed Center Metal Grinding Discs Wheels for Angle Grinder, Aggre 100mm diameter x 6mm thickness x 16mm arbor hole, 10-PacksPOWERTEC POWERTEC 15517-P2 Bench and Pedestal Grinding Wheels, 8 Inch x 1 Inch, 5/8 Arbor, 60 Grit, Aluminum Oxide Bench Grinder INCLUDES: (2) 8” Aluminum Oxide Grinding Wheel w/ 60 grit