... standard allen key, made of carbon steel, nickel plated. size- M4 strength-HRC48-55 DIN911 Carbon Steel ... .8 , 10.9 , 12.9 Finish : Plain , Zinc Plated , YZP , HDG , Dacrotized etc. hex wrench, used to ... in different electronic and electrical industry, sports equipment, lighting products, skates, and small flashlight, and so on.We ... to us , get more information DIN911 nickel plated Steel Allen Key