This draper 400mm 600mm 12quot square drive extending flexible handle is manufactured from chrome molybdenum steel that is hardened tempered chrome plated and polished for corrosion protection featured is a hinged joint head and knurled grip for ease of use the extending handle locks in any position between 400mm minimum and 600mm maximum and is carbon steel hardened tempered and chrome plated a sring loaded ball bearing is featured for secure socket holding