M8 thread bottom drill bushing (inner diameter drill bushing 67-68)

M8 thread bottom drill bushing (inner diameter 6.7-6.8 bit holder) large supply of low M8 threaded hole drill bushing (inner diameter 6.7-6.8 drill sets), and lower prices, better quality, long life and is more resistant with other common thread bottom hole drill sets supply, (internal diameter drill bushing supply 3.0,4.0,5.0,6.0 6.7,6.8,8.0, etc.) Also available in various types of GB / non-standard drilling units, fixed drill sets, interchangeable drilling units, alloy drill sleeve, tungsten steel drill sleeve, adjustable sets, Morse taper drill sleeve sets and other processing