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Best Choice Ludwig Precision 
Ludwig Precision 18" Center-Finding Aluminum Straight Edge, 81218 18" LENGTH – Aluminum metal ruler is a straight edge that is a durable tool for measuring and draftingWe R Memory Keepers 
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Heavy Duty Ruler Self Defense - 20" Stainless Steel Metal Ruler with Inch/Cm Scales, Non-Slip Grip & Protective Sheath - ✔️Solid hardened steel: The heavy duty ruler is handmade with thickened hardened steel, which has both high strength andAlumicolor 
Alumicolor AlumiCutter Aluminum Steel Straight Edge for Office, School, Engineering and Framing, Black 12"LENGTH - Standard 12" aluminum Steel Edge ruler is perfect for measuring, cutting, drafting and any craft projectWestcott 
Westcott Grid Ruler with Metal Cutting Edge, 1.5 x 12.5, Transparent (B-1M) Product Type: RulerPOWERTEC 
POWERTEC 71332 Anodized Aluminum Straight Edge Ruler | 38 Inch | Metal Straightedge Machined Flat to Within 0.003” Over FUNCTION: A cost effective alternative to determining table surface flatness, engine block flatness, and can be used onYUENTOEN 
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