Small Size: This set contains five taps of different sizes: M3*0.5, M4*0.7, M5*0.8, M6*1.0, M8*1.25. T-tap wrench size: 80*60mm/3.15*2.63in High Quality Material: The wrench is made of ball bearing steel, the taps are made of high speed steel. They are durable and firm, not easy to break or bend Humanized Regulator: It can be easily switch from positive to negative by humanized adjustment, the middle is the lock for non-rattling use. In addition, the tool with a ratchet mechanism makes it easy to cut and remove even in the narrow space Save Your Effort: The tap holder bar provides perfect support for your hand, allows you to gather your strength at any point you want Versatile: Suitable for automotive repair and machinery with specified metric threads and for machining and drilling