Hardened and tempered Chrome Vanadium steel with a fully polished mirror finish. Handle extension retained at set increments with a quick release locking ring giving five different shaft lengths from 480-630mm. Spring loaded socket retention. Fully replaceable knuckle joint*. *Note: Knuckle joints are not covered by the lifetime guarantee and are treated as consumable items. SEALEY PREMIER - One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. HARDENED AND TEMPERED CHROME VANADIUM STEEL For strength and durability, with fully polished mirror finish. FIVE SHAFT LENGTHS Handle Extension set at five increments from 480-630mm. QUICK RELEASE LOCKING RING With knurling for superior grip and fast length adjustments. SPRING LOADED For socket retention. FULLY REPLACEABLE KNUCKLE JOINT* - *Note: Knuckle joints are not covered by the lifetime guarantee and are treated as consumable items.