18 INCH Hook Ruler, Hardened stainless steel, Satin chrome finish, 4R scale, Adjustable hook can be used on either side, High squareness and
iGaging Premium Steel Rules
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TOFL 12 Inch Hooked Ruler Double Sided Standard and Metric Measurements
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Mitutoyo 182-142 Steel Wide Rigid Rule: 18 inch (16R)
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IDEA Engineering
iGaging Stainless Steel Rule-34-107
Precision Measuring Tools
Made from hardened spring steel. Rigid blade is 6 long, .040” thick and 1” wide Rule is precision photo etched and black filled for long life and
Taytools 6 Inch Rigid Machinist Rule Ruler Hardened Spring Steel 4R Graduations in 1/8, 1/16, 1/32 and 1/64 Inches MRSAE
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18 4R Rigid Rule (402-018) - PEC TOOLS
iGaging T21579 - 24 Bevel Edge Straight Edges with Scale