Semi-automatic screwdriver: Press the handle, the spiral knife bar will automatically rotate to achieve the effect of tightening or loosening the screw, more than other screwdrivers. Spiral ratchet models are much easier on your wrists and allow your wrist to rest. Adjustment switch: There are 3 adjustable modes: loosen, tighten and fix, easy to use. Suitable for various occasions. Comfortable handle: Comfortable to grip, practical and convenient. High hardness material: Made of chrome vanadium alloy steel, strong and . It is and portable, can be in your toolbox. 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. Push Pull Ratchet Screwdriver is a semi-automatic screwdriver that is easy to use and more than other manual screwdrivers when working. Fantastic screwdriver, very easy to use. It is, fits in the