Apply massive loosening force with the cam action of this impact driver. Easily frees rusted or frozen screws, nuts and bolts while avoiding the common problem of in.rounding outin. the fastener head. 1/2in. drive body may be used with #2 or #3 Phillips, 8mm or 10mm wide slot bits, or attach your own impact socket. A simply hammer strike to the tool body forces the loosening action in either a left or right-hand direction. Chrome vanadium material.