A well machined head featuring OptiGrip a specially designed gripping surface with 'triple-point support' that ensures optimal hold of the workpiece while working. The pivot point of the hinge has been designed to give increased leverage, and hence a more powerful grip. This DynamicJoint ensures the maximum transmission of your hand strength to the cutting edges. Made from high quality tool steel, the head is carefully tempered and the cutting edges additionally induction hardened to approx HRC 64. Individually tested protective insulation 1,000V AC, VDE and GS tested. DIN ISO 5746, manufactured according to IEC 60900:2012, length 180mm(7").