Description: Instant impact force loosens rusted or frozen screws without damaging them Forward and reverse drive direction. Drives included screwdriver bits or any 1/2 in. drive impact socket. Comfortable handle with non-slip knurled grip. Frees corroded brake caliper screws and other vehicle or outdoor fasteners exposed to the elements. Goes anywhere, no air or power source required. Specification: Screwdriver Bits: Flat: 5/16", 3/8" Phillips: #2, #3 Case size: Approx 160*30*30mm Package Includes: 1 Piece Impact Driver 6 Pieces Screwdriver Bits 1 Piece Storage Case Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making payment. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you