Draper 1/4" Hex & 3/8" Square Driver Adaptors Use in conjunction with any 1/4" hexagon drive unit, i.e. h&, electric or air screwdrivers To drive 1/4" & 3/8" square drive sockets Comprises 1/4" hexagon x 1/4" square & 1/4" hexagon x 3/8" square adaptors Chrome vanadium steel hardened, tempered & chrome plated Each square driver end incorporates a spring-loaded retaining ball for secure socket holding