Wera Tools - Kraftform Kompakt 900 Set 1The impact screwdriver 921 combines the advantages of manual impact wrenches, compact tools and screwdrivers with pound thru blade. The impact wrench function offers a loosening moment of up to 25 Nm. The robust bit holder allows the mounting of different specialised bits for various screw profiles. The pound thru blade ensures complete power transmission (zero loss). The impact wrench function and screwdriver function can be switched as required.