Sealey Premier Wobble Extension Bar Set 1/4"Sq Drive 5pc. Forged Chrome Vanadium steel shafts, heat treated and chrome plated with mirror finish. Cut-away tips allow sockets to be driven with shaft offset of 10°. Deep knurling on shafts allows extra grip when spinning off fixings. Spring-ball socket retainers. Sizes: 50, 75, 100, 150, 225mm. Lifetime guarantee*. Model No. AK766. Weight0.3kg. Forged Chrome Vanadium steel shafts, heat treated and chrome plated with mirror finish. Cut-away tips allow sockets to be driven with shaft offset of 10°. Deep knurling on shafts allow extra grip when spinning off fixings. Spring-ball socket retainers. Drive: 1/4"Sq. Length: 50, 75, 100, 150, 225mm. Material: Chrome Vanadium. Nett Weight: 0.27kg.