Heat treated and hardened Chrome Vanadium steel shafts. Fully polished black chrome finish with machined and lacquered heads. Cut-away tips allow sockets to be driven with shaft offset of up to 10. Deep knurling on shafts allow extra grip when spinning off fixings. Spring-ball socket retainers. One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. Heat treated and hardened Chrome Vanadium steel shafts. Fully polished black chrome finish with machined and lacquered heads. Cut-away tips allow sockets to be driven with shaft offset of up to 10. Deep knurling on shafts allow extra grip when spinning off fixings. Spring-ball socket retainers. Lifetime guarantee*.