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. SEALEY PREMIER - One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. HEAT TREATED CHROME VANADIUM STEEL SHAFTS Forged for strength and durability. CHROME PLATED FINISH For resistance to corrosion and wear. CUT AWAY TIPS - Allow sockets to be driven when shaft offset is up to 10 from its axis. DEEP KNURLING ON SHAFTS Allows extra grip when spinning off fixings. WOBBLE SOCKET EXTENSION Features two-way head function and spring-ball socket retainers ideal for applications in confined areas. 5PC SET Sizes include: 50, 125, 250, 375, 500mm. LIFETIME GUARANTEE*.