1) belt drive for precise depth setting; 2) fast-changing tapping chuck, 3) safety device for auto feeding and ... ,2.5,3,4,5,6,8,10): 1SET;4)Fast tapping chucks (J4016A/MS2; M5-M16): 1 SET; 5)Handle ... , users can buy other pitches of gears from us. automatic teeth distance tapping machine