6.3 mm (1/4″) hex drive and supplied with HSS combination drill/tap bits. Universal holder with quick-change chuck (Rapidaptor technology). Tap bits for use with hand and power tools (conventional cordless screwdriver)Contents:1 universal bit holder (50 mm, non-magnetic)1 combination tap bit ea. in sizes 2.5, 3.3, 4.2, 5, 6.8, 8.5 (M3, M4, M5, M6, M8, M