1. Proven and well designed arms and T-shape arm bars ensure smooth moving and good durability.2. Special designed check valve provide sideshifting without the third cylinder.3. Low profile frame for good visibility over the clamp.4. Superior slide bearing promises extended service life.5. High quality PU/Nylon contact pads to ensure reliable clamping.6. Regenerative hydraulic valve for optimal arm speed.7. 2 pieces of truck auxiliary valves are necessary. 140bar≤ Working Pressure ≤180bar.8. Fitting Screw M18X1.5-74°(concave); Recommended Hydraulic Pipe internal diameter = 10mm .