1) belt drive for precise depth setting; 2) fast-changing tapping chuck, 3) safety device for auto feeding and withdraw. technical specification1) ... Max tapping diameter:M162) Max tapping depth:65mm3) Spindle travel: 65mm4) Distance from spindle ... .5,3,4,5,6,8,10): 1SET;4)Fast tapping chucks (J4016A/MS2; M5-M16): 1 SET; 5)Handle: ...