5 Piece Knurled Wobble Extension Bar Set1/2" Sq DriveSocket RetainerForged 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. Supplied in storage tray. Not for use with impact toolsFeatures: Forged Chrome Vanadium steel shafts, heat treated and chrome plated with mirror finish. 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. Spring-ball socket retainers. Sizes: 50, 125, 250, 375, 500mm. Supplied in storage tray. Lifetime guarantee . Specification: Drive -1/2"Sq Length -50, 125, 250, 375, 500mm Material -Chrome Vanadium Net Weight -2.22kg Further Information We sell a wide variety of tools and workshop equipment for both the DIY and Professional markets. Alias: ys01822 Loops 5 Piece Knurled Wobble Extension Bar Set - 1/2" Sq Drive - Socket Retainer