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The Starrett 5/8 x 36 x 1/2 inch O1 oil-hardening flat stock is ideal for creating high-strength punches, dies or cutters that require increased wear resistance and durability while maintaining toughness. This premium carbon tool steel boasts a hardness range between 0.95-1.2% chromium content perfect for applications such as thread rolling, plastic injection molding and automotive manufacturing among others within the industrial sector.