Draper Socket Adaptor Set, 1/4"" Hex. x 1/4\"", 3/8\"" & 1/2\"" Sq. Dr. (3 Piece) Designed for use in conjunction with any 1/4\"" hexagon drive unit, i.e. hand, electric or air screwdrivers, to drive 1/4\"", 3/8\"" and 1/2\"" Sq. Dr. sockets. Comprises 1/4\"" hexagon x 1/4\"" square, 1/4\"" hexagon x 3/8\"" square and a 1/4\"" hex x 1/2\"" square adaptors. Manufactured from chrome vanadium steel hardened, tempered and chrome plated. Each Sq. Dr. end incorporates a spring-loaded retaining ball for secure socket holding. Display packed. Dimensions: 17.20cm x 18.00cm x 1.80cm. Weight: 0.09kg.