The Ryobi 34-Piece Impact Rated Driving Bit Kit is a must-have for all your impact driving needs. These bits are composed of a proprietary impact strength steel. These bits are impacted rated in order to endure the toughest torque applications. Identify this kit quickly with the easy-to-read description on the side of the case. Save time and frustration from digging through all your loose bits when you dock the case in the Ryobi DOCKit storage system tray (sold separately).