Phillips PH impact screwdriver bits with increased strength compared to standard screwdriver bits. Specially designed geometry with tapered profile, twists when used, in order to absorb maximum torque. This protects both the screwdriver bit and the screw itself from damage. For use in screwdrivers or impact drills which significantly speed up the work. Particularly suitable for frequent and heavy duty work. A must-have for any demanding and lengthy workshop work as well as for renovation and construction or carpentry work.