A cordless drill driver is a power tool that can drill holes and drive screws. It is perhaps the most useful power tool for anyone from a DIY enthusiast to professionals.The Top 5 Uses:1Replacing the screwdriver: The cordless drill’s top use involves attaching and assembling. Using a screw bit, the craftsman can position a screw on the end of the bit and quickly insert it into the project. With the flip of a switch, the cordless drill driver can rotate counterclockwise, making it invaluable for removing screws as well as installing them. Etc