Dewalt 6 drill flip drive complete unit allows for quick and easy changes between drilling and driving， letting the user finish jobs faster. These black oxide split-point drill bits start on contact and have a contoured finger grip for easy ergonomic use. These drive units feature quick change mechanism for easy one-step loading and are easy to push forward for one-handed release. A 5/16-inch shank for added durability and is one integral unit that keeps everything together and no lost parts. The multi-cutter countersinks for superior finish.