din911 standard allen key, made of carbon steel, nickel plated. size- M4 strength-HRC48- ... ~M19Standard : DIN , ISO , ANSEGrade : 4.8 , 8.8 , 10.9 , 12.9 Finish : Plain , Zinc Plated , YZP , HDG , Dacrotized etc. hex ... to us , get more information DIN911 nickel plated Steel Allen Key