The Bosch Drilling and Driving Mixed Bit Set features driver and drill bits for all-in-one convenience. This set also comes with a variety of accessories to help solve general drilling and fastening tasks. The included driver bits are designed to lessen damage to the screw head， with better bit-gripping power. This set provides drill bits for applications for wood， metal and masonry. It also provides an easy-to-use case， to help the user organize the bits.