Forged Chrome Vanadium steel shafts, heat treated and chrome plated with mirror finish. Dual feature allows off-centre driving of sockets at up to 10 from centre axis or at 0. Supplied in storage tray. One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. Forged Chrome Vanadium steel shafts, heat treated and chrome plated with mirror finish. Dual feature allows off-centre driving of sockets at up to 10 from centre axis or at 0. Length: 1/4"Sq; 100, 150mm, 3/8"Sq; 75, 150, 250mm, 1/2"Sq; 125, 250mm. Supplied in storage tray. Lifetime guarantee*.