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HFS(R) Precision Gage Block Set - 36 Pieces with AS-2 Accuracy, Fully Seasoned Alloy Tool Steel, Ideal for Workshop Calibration and Inspection: Amazon.com: Industrial & Scientific
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Precise 81 Piece .1001" thru 4" Grade A+ Precision Gage Block Set - PAA-81 - 57-046-004 - Penn Tool Co., Inc
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Amazon.com: Accusize Industrial Tools Precision 81-Piece Steel Gauge Block Set, Grade B Accuracy, Corrosion-Resistant, P900-S581 : Industrial & Scientific
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