Name: non sparking striking open end wrench Introduction: Knocking, disassembling and fastening the larger size of the six hexagon head bolts and nuts matched with fitter’s hammer in inflammable and explosion place. Material: Be-Cu,Al-Cu,precision casting products Size: 17,19,22,24,27,30,32,36,41,46,50,55,60,65,70,75,80,90 (mm）