... bits;hex:3,4,5,6,8mm:ph:ph1,ph2,sl:3,4,5.5,6.5,8carbon steel,heated 4 ... handlecarbon steel,heated 1pc-60mm quick chang bit holder,7pcs-sl:3,4,5,5.5,6,7,8mm,12pcs-hex ... central hole:2,2.5,3,4,5,6,4pcs-SL with cental hole :4-6-8-10mmcarbon steel,heated auto ...