Features:It's easy to switch bits in a few seconds!Rotating head and drilling lock from drilling to drivingWork with your own power rigDrilling and driving in half the timeThe collection includes:1 section half drill8 Phillips positions (2: PH0, PH1, PH2, PH3)8 flat head positions (2: 1/8" 3.2mm, 5/32 4mm, 3/16" 4.8mm, 1/4" 6.3mm)2 countersink bits (3/32) 2.4mm, 1/8 inch 3.2mm)1 Allen Wrench