Craftsman 13-piece Extreme Grip Bit Driver Set (9-47227) Extreme Grip Bit Driver has 143x more gripping power vs. standard bit driver; 3 Position ratcheting mechanism provides smooth operation; Ergonomic dual material handle for comfort; 1 - Extreme Grip Driver; 12 - Bits: 1/8, 5/32, 7/32, 1/4, 9/32-In., PH#1, PH#2, PH#3, RB#0, RB#1, RB#2, RB#3