Manufactured and tested generally in accordance with DIN3122 and ISO3315 Specifications Expert Quality, head and shaft manufactured from chrome vanadium steel hardened, tempered and chrome finish for corrosion protection. 180° hinged joint head. Pull back collar with knurled ring allows handle to extend from 460 (minimum) to 730mm (maximum). Extending handle locks in three positions. Spring-loaded ball bearing for secure socket holding. Carton packed.