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WEN 3 in. x 2 in. x 1 in. Steel-Hardened Precision 1-2-3-Gauge Blocks (2-Pack) 10423 - The Home Depot
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waltyotur 1 Matched Pair Ultra Precision 1-2-3 Blocks 23 Holes 1 * 2 * 3 Block 0.0003 Machinist 123 Jig Fit for Milling Machine Used for Set-up,Layout and Inspection Jobs: Amazon.com: Industrial & Scientific
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2pcs Hardened Steel 1-2-3" Blocks 0.0001" Precision Matched Machinist 123 Milling Tool 23 Holes 25-50-75mm block gauge
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Expanding the Usefulness of Your 1-2-3 Blocks with a Hardware Kit « Adafruit Industries – Makers, hackers, artists, designers and engineers!
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1-2-3 Blocks Single 1/2" Hole Matched Pair (2 Each), Hardened Steel RC 55-62, (1"x2"x3") 123 Precision Ground Machinist Set Up Blocks TTW123SH: Amazon.com: Industrial & Scientific
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