Tool Steel Flyer | Wilson Tool
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Tool Steel Flyer

PM-M4 is a low-sulfur, high-carbon tool steel made using the latest generation of powder processing technology. This results in an extremely tough steel that far outperforms standard tool steels in high-compression applications. It is hardened to a 62–64 on the Rockwell C-scale, which places it among the hardest steels available today.

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