This is a unique split-body attachment that works with most power drills and allows you to get the drill bit into the most vexing spots around tight corners and into hard-to-reach spots. The two halves of the attachment (handle and the body) are both capable of 360-degree rotations, so you can position and lock the bit in just about any place and at any angle you desire. The handle grip twists to lock or unlock the gears, and a keyless 3/8-inch chuck makes bit changes quick and easy.