Description Add versatility to your power drills. This 3pc Power Extension Socket Adaptor has Hex a bit for all power drill chucks. Comes in 3 Sizes: 1/4 in. , 3/8 in. & 1/2 in. for your full range of sockets. Socket Bit Adapter Drill Nut Driver Power Extension Bar 3pc Set 1/4" 3/8" 1/2"