Steel: 6140CrV 44-48 HRC Nickel plating A: 36 mm; B: 42 mm; C1: 12 mm; C2: 13 mm; Length: 230 mm A split key is necessary for servicing hydraulic and pneumatic systems. It is a six-sided fitting profile with a notch for fitting the key onto the pipeline. The profile of the split key is more massive and higher, unlike the socket key, which increases the contact area and reduces the risk of fastener deformation. The working profile of the split key is offset by 15º relative to the longitudinal axis, which provides greater possibilities when working in limited space. The keys are made of chrome-vanadium steel. Nickel plating with a protective lacquer layer provides additional corrosion resistance.