Steel: 6140CrV 44-48 HRC Nickel plating A: 13 mm B: 14 mm Length: 195 mm The double-sided hinge wrench is a non-dismantlable option of a drive and extender with a hinged twelve-sided socket head (angle of inclination 180°). It is designed for effective use and transmission of significant force when working in hard-to-reach places. Rotating the socket head parallel to the body of the wrench allows for quick loosening and tightening of fasteners when no large force is required. You can also buy a set of hinge wrenches.