The dewalt dt71511 qz 35 piece drilling screwdriving set is ideal for metal drilling and screwdriving applications it comes in a medium size tough case for convenient storage and portability of the high quality professional screwdriver bits the hss g metal drill bits are precision ground twist drill bits for rapid drilling long life and excellent concentricity all the screwdriving accessories in this kit are impact rated for use in impact drivers the inclusion of dewalts innovative cleanable n