Steel: 6140CrV 44-48 HRC Nickel plating A: 11 mm B: 13 mm Length: 150 mm The hinge combination wrench is a non-disassembled version of a drive and extender with a hinged twelve-sided socket head (180° angle). It combines the capabilities of a socket head and an open-ended wrench profile. Designed for efficient use and transmission of significant force when working in hard-to-reach areas. Rotating the socket head parallel to the body of the wrench allows for quickly loosening and tightening fasteners when applying a large amount of force is not necessary. The open-ended wrench profile allows for working with fasteners in cases where access to the fastener is only possible from one side. You can also purchase sets of hinge combination wrenches 516 061 and 516 091.