Selected from stainless steel, strong and durability. It is small and portable Simple locking type, pull back the shell to open the insert the bit to easily the bit These Spirals Ratcheting models are easy to wear on your wrist, allowing your wrist to rest Comfortable grip, and practical, 3 of loose, tight and fixed, easy to use. Suitable for all occasions Press the handle, the screwdriver rod will automatically rotatable, achieving the effect of tightening or loosening the screw, faster than other screwdriver, Manufacturer: Yhplxyuus