The Kimball Midwest Revolver Auto-Loading Multi-Bit Screwdriver has self-contained, retractable bits that can be changed instantly by rotating the cylinder to the desired bit and pushing the bit cylinder back into place. The Revolver can also be converted into a rapid-change torx driver, hex driver or security bit driver. The tool comes preloaded with Phillips #1, #2, #3 and slotted 1/8", 3/16", and 1/4" bits.