Performance Tool W9026 6-Inch Socket Adaptor Set, 3-Piece 1/4, 3/8 and 1/2" drive sizes. 5" hex shank. Impact grade chrome vanadium steel. Transforms your power drill into a power nut/socket driver. Ball bearing ensures sockets are securely Seated. Impact grade chrome vanadium steel Ball bearing ensures sockets are securely seated 5" hex shank 1/4, 3/8 and 1/2" Drive sizes Transforms your power drill into a power nut/socket driver