ITEM NAME:Multi-purpose Impact Screwdriver Screwdriver Set Impact Screwdriver Hardwar S3K7 Multi-purpose Impact Screwdriver Screwdriver Set Impact Screwdriver Hardwar S3K7 This impact screwdriver produces a large torque by hammering a screwdriver to turn the bolt.It can easily loosen rusty and cold welded bolts with a hammer and can also be used to tighten bolts. The screwdriver head is made of chrome vanadium steel,which has high hardness,rust prevention and long service life. 6 different sizes of screwdriver heads to meet your different needs. Widely used to easily loosen or tighten rust and cold welded bolts with a hammer. Textured handles provide comfortable grip and control.With a plastic case,it is well stored and easy to carry. color:red Material:chrome vanadium steel + plastic Size:22*7*6.5cm.6 batch head.