Easy Grip Screwdriver Handle. Extension Bits Holder: • Philips Bits: PH000, PH00, PH0, PH1.• Slotted Bits: 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0mm. Pozidriv Bits: PZ0, PZ1. • Star Bits: T4, T5, T6, T7, T8, T9, T10, T15, T20 • Hex Bits: 0.7, 0.9, 1.3, 1.5, 2.0, 2.5, 3.0, 4.0mm