Rok HJC40 Universal welding gauge fro undercut, with locking screw Part No: WG-401 Brand: ROKTOOLS Measure all welding geometry parameters with one tool! The highest quality welding gauge available. Made from heavy duty stainless steel Precisely machined and engraved. Available in inch or metric scales Measure all welding geometry parameters with one tool! The highest quality welding gauge available.? Made from Stainless Steel? Precisely machined and engraved