Resources - Welding and Lever Pit Gauge Tri-Gauge (N88L-1)Tri-Gauge Operator InstructionsJr Tri Gauge (N88L-2)Jr. Tri-Gauge Operator InstructionsMulti-Weld (N88L-3)Weld Measurement Gauges Weld Undercut and Weld ReinforcementMulti-Weld Operator InstructionsTire Tread Gauges For Corrosion