The 52in. long flex shaft lets you work in tight areas where a drill just won't reach! It features pre-lubricated and sealed ball bearings, a 1/4in. arbor end, and a 5/16in. chuck. Each end also has a strain relief sleeve to prevent kinking. The drill mount is a sturdy, all-metal clamp that allows rigid mounting of your drill to drive buffing and grinding wheels, cutting bit, or flex shafts. Works with drills up to 4 1/2in. diameter and benches to 2 3/8in. thick. Easily swivels and locks drill in 360 degree mount.