Uber Workshop - 3 Piece Step Drill Bit Set with Pouch - Impact Driver Compatible - 28 Sizes Set comes with 3 different bits Impact driver compatible - 1/4 hex shank - quick release Dual fluted design for better chip removal and smoother finishing Compact storage pouch keeps bits together and helps protect them from damage when not in use Bit #1 = 1/4-3/4 (9 steps) bit #2 = 1/8-1/2 (13 steps) bit #3 = 3/16 - 1/2 (6 steps)