Proto Spline tools are designed to service High tensile strength fasteners used widely on Military and commercial aircraft and in heavy machinery applications where vibration is prevalent. They are also used in automotive and industrial areas where high performance Torque needs to be achieved, Spline fasteners help tighten high strength bolts to high torque loads, They help lower the force required to turn standard fasteners by allowing the torque load to be moved away from the corners, helping prevent fastener rounding. They also turn fasteners with damaged corners, Spline helps reduce foreign object debris (FOD) by having a precise fit between the fastening tool and its fastener, full polish finish provides corrosion resistance and an easy to clean surface.Exhaustive in our efforts to make the world?s safest tools, Unique in the marketplace, relevant to our customer?s work style, Proto helped build 1934 Fords, the Golden gate bridge and Apollo 728, made in America, making the highest quality tools Comes first, confidence that our tools will help keep them working longer and safer.

Proto Spline tools are designed to service High tensile strength fasteners used widely on Military and commercial aircraft and in heavy machinery applications where vibration is prevalent. They are also used in automotive and industrial areas where high performance Torque needs to be achieved, Spline fasteners help tighten high strength bolts to high torque loads, They help lower the force required to turn standard fasteners by allowing the torque load to be moved away from the corners, helping prevent fastener rounding. They also turn fasteners with damaged corners, Spline helps reduce foreig