Pro-LifT M-0002 Autoloading Precision Screwdriver with Gearless Ratchet The designed mechanism makes changing bits in seconds. Changing the chamber to the desired bit, then push the handle forward. 10 pieces bits are stored in revolving chamber and handle. 6 pieces in the revolving chamber : Philips: No.00, No.0, No.1. Slotted: 1.5mm, 2.0mm, 3.0mm 4-Piece in the handle, Star : T5, T6, T8, T10 3 way gearless ratchet: Forward, Reverse and Locked