Dewalt dt71501 qz drilling and screwdriving set 56 piece dewalt dt71501 qz this 56 piece drilling and screwdriving set from dewalt is ideal for wood drilling 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 designed with a flexible torsion zone to absorb torque peaks and reduce breakage br br the flatwood drill bits have a ground central point and a ground chip br