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

• Spline sockets help tighten high strength bolts to high torque loads
• Also used in automotive and industrial areas requiring high performance torque
• Measurements provided in inches

Spline sockets help lower the force required to turn standard fasteners by allowing the torque load to be moved away from the corners to help prevent fastener rounding.