1. Screwdriver handle can be matched with screwdriver head ( T-shaped socket head hexagon extension bar universal joint can accommodate bending bar) 2. The sleeve is made of high-quality chrome vanadium steel 50BV30 by cold pressing. The torque is 50% higher than that of carbon steel. The sleeve is treated with second-class smooth and has good rust prevention effect. The batch head is made of -V material, which has higher hardness and toughness. 3. The ratchet wrench (positive and negative adjustable) that falls off quickly, the button quick release function can that the socket is firmly locked in the use process, and the socket can be easily removed or quickly replaced with greasy or greasy fingers. 4. Our high quality 45 tooth ratchet can improve the operation speed. It's an perfect set of tools for opening the accelerator, and the small nuts are usually used in air conditioning, seat nuts, tire fenders, door locks and household (basically included). Specification: Pattern hexagon