Product Features:Transform any drill into a power nut driver with these three impact grade steel square socket adapters: 1/4, 3/8, and 1/2All 3 have built in detent balls to help hold your sockets in place during use6 x 1/4 hex head flex extension bar has free spinning collar and detent ball to hold bits securely in placeThe included quick change adapter fits any brand of drill to help you easily switch between all hex shaft drill and driver bitsMagnetic 3 x 1/4 Hex drive extension holds onto fasteners, freeing up your hands in tight spaces