CPM M4 tool steel bar block, RARE, sup. to M2,D2,A2 6LB

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For sale is a CPM M4 Crucible Steel Bar. Dimensions 6x2x1.5 inches. This is the highest quality crucible sintered steel by Crucible Materials Corporation. Superior to the regular M2 high speed steel. See http://www.crucibleservice.com/products/metalforming/upgradechart.cfm for details.