Skmoon Damaged Screw Remover and Extractor Set , Made from H.S.S. 4341#
Manufacturer SKmoon. Why choose SKmoon?. Made from H.S.S. 4341#, the hardness is 62-63HRC. Made of durable hardened steel and tempered twice for extra hardness. Made from H.S.S. 4341#, The Hardness is 62-63hrc.