Steel: 6140CrV 44-48 HRC Nickel plating A: 26 mm; B: 27 mm; C1: 10 mm; C2: 10 mm; Length: 190 mm A spanner wrench is necessary for servicing hydraulic and pneumatic systems. It is a 6-sided fitting profile with a groove for fitting the wrench onto a pipeline. The profile of the spanner wrench is more solid and higher compared to an open-end wrench, which increases the contact area and reduces the risk of fastener deformation. The working profile of the spanner wrench is offset by 15º relative to the longitudinal axis, providing wider possibilities for work in confined spaces. The wrenches are made of chrome-vanadium steel. Nickel plating with a protective lacquer layer provides additional corrosion resistance.