socket tool,pneumatic tools,socket tool set material:CR-MO ExSurface:p648-523 black Meet and exceed DIN/ISO standard socket tool,pneumatic tools,socket tool set1.type:3/4 standard impact socket2.length:57,58,62,68,71,73mm3.size:36-65mm4.materail:CR-MO5.Surface:p648-523 black All impact sockets are made of CR-MO (chrome molybdenum alloy steel) and meet or exceed DIN and ANSI standards