用途：用于紧固和拆卸六角头或方头的螺栓和螺母

SK138A（6件）8*10mm 10*12mm 12*14mm 14*17mm 17*19mm 22*24mm

SK138B（8件）5.5*7mm 8*10mm 10*12mm 12*14mm 14*17mm 17*19mm 22*24mm

SK138C（9件）8*10mm 10*12mm 12*14mm 14*17mm 17*19mm 19*22mm 22*24mm 24*27mm 30*32mm

SK138D（10件）5.5*7mm 8*10mm 10*12mm 12*14mm 14*17mm 17*19mm 19*22mm 22*24mm 24*27mm 30*32mm

SK138E（11件）5.5*7mm 8*10mm 10*12mm 12*14mm 14*17mm 17*19mm 19*22mm 22*24mm 24*27mm 27*30mm 30*32mm

SK138F（13件）5.5*7mm 6*7mm 8*10mm 9*11mm 10*12mm 12*14mm 14*17mm 17*19mm 19*22mm 22*24mm 24*27mm 27*30mm 30*32mm