Steel: 6140CrV 44-48 HRC Nickel plating A: 25.5 mm B: 41 mm Length: 250 mm The hinged combination wrench is a non-separable variant of a drive and extension with a hinged twelve-sided socket head (180° angle). It combines the capabilities of a socket head and an open-end profile. It is designed for efficient use and transmission of significant force when working in hard-to-reach places. Turning the socket head parallel to the body of the wrench allows for quick tightening and loosening of fasteners when applying high force is not necessary. The open-end profile allows for working with fasteners in cases when access is only possible from one side. You can also purchase sets of hinged combination wrenches, 516 061 and 516 091.