This handy new tool lets you two bits on the drill head at the same time which allows you to literally flip from drilling to driving within seconds Never change a bit in the middle of a job again Select 2 different size bits, drill your pilot hole, flip the pivot arm, then drive in any screw, nut or fastener. 2 IN 1 DRILL DRIVER 1 Drill and Bit Holder. 2 Bits, 50mm(PZ2+T20). 2 HSS Drill 4mm,5mm. 1 HEX Spanner.