Stainless stell hex key wrench Material:A2,A4,SS316,SS304, Standard:ISO,GB,DIN,ANSI Cretificate:ISO9001-2008,ROHS Stainless stell hex key wrench ... % Nickel,4.8,6.8,8.8,12.9Material grade A2,A4,high stress steel.ColorPlain, blue plated, white plated, yellow ... die, plasticly deforming the metal. Other ways to generate the hex socket include linear broaching and rotary broaching. Broaching the heads with ...