Semi-automatic screwdriver: Press the handle, the spiral knife bar will automatically rotate to achieve the effect of tightening or loosening the screw, it's faster than other screwdrivers. These spiral ratchet designs are much easier on your wrists and give your wrist a rest. Push Pull Ratchet Screwdriver: It can easily solve the problems of narrow space, screw position deep and inaccessible screw. One-handed press operation, it can be used in the position while other screwdrivers cannot. Press the screwdriver to tighten or unscrew the screw, greatly improving work efficiency. High hardness material: Made of chrome vanadium alloy steel, solid and durable. It is small and portable, can be placed in your tool box. This screwdriver is made of high quality materials and is durable and has a long service life. Simple assembly and disassembly: Simple self-locking type, pull the lock case to open the lock and insert the batch head, easy to lock the batch head. The self-locking shell can be fixed when rotating, suitable for portable use. Comfortable handle: This ratchet screwdriver adopts ergonomic handle design. It is available in wood and plastic. It has three adjustable modes: loose, tight and fixed