Proto face spanner wrenches are designed to tighten lock nut rings, collars and seal nuts on hydraulic cylinders in automotive, production, maintenance & repair and hydraulic equipment. These face spanners feature precision machined pins for secure engagement with slots & holes on the bearing face for slippage proof operation & user safety and alloy steel construction for withstanding harsh industrial abuse while ensuring long-term operation. They further come equipped with non-reflective black oxide finish that provides complete protection against hydraulic fluids and abrasive chemicals. Choose from a wide range of adjustable face spanner wrenches, available in 2, 3 and 4 inch handling capacities on Raptor Supplies.