Press the Ratchets switches, the screwdriver rod will rotates to achieve the effect of tightening or loosening the screw, faster than other screwdriver These Spirals Ratchets models are easy to wear on your wrist, allowing your wrist to rest With 5 screwdriver heads, flat screwdriver & for crossed screwdriver Crafted from ABS and steel, ergonomic handle provide a comfortable grip and is resistant to oil or solvents Easily solve the problems of small space, screw position, and screw inaccessibility Single hand pressing operating can be used in locations where other screwdriver cannot be used Three modes of adjustable, loose, tight and fixed, easy to use Suitable for all occasions, Manufacturer: SHANGYAKEJI