Specifically designed to handle the abuse that impact drivers dish out, the DEWALT DW2149 28-piece screw driving set consists of the most commonly used bits that are made of a special steel designed to be ultra-durable. Each bit uses a black oxide process for greater wear resistance and strength. The tips in the DW2149 set can be used with impact tools rated for up to 2,000-Inch/lbs. of torque. The kit consists of a variety of different tips, including Phillips, square drive, and flat head bits. It also has come drivers, a magnetic tip holder and various double and single sided tips. Comes in a tough case to keep it organized and easy to transport.