Steel: 6140CrV 44-48 HRC Nickel-plated A: 17 mm; B: 20 mm; C1: 7 mm; C2: 8 mm; Length: 140 mm A spanner is necessary for servicing hydraulic and pneumatic systems. It is a 6-sided profile with a slot for fitting the spanner onto the pipeline. The profile of the spanner is bulkier and higher compared to a wrench, which increases the contact area and reduces the risk of fastener deformation. The working profile of the spanner is offset by 15º relative to the longitudinal axis, providing wider possibilities for work in confined spaces. The spanners are made of chromo-vanadium steel. Nickel plating with a protective lacquer layer provides additional corrosion resistance.