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