Help you make different kinds of measurement. To make the welding more accurate. Brief Case Type Tool Kit (13pcs welding gauge kit) 2. Supply all types of weld gauge 3. High quality Tools Includes: 1.0-150mm ruler 2. MG-11 metric system 3. LO Welding gauge 5. LO Welding gauge 6. Fillet Welding Gauge 7. Fillet welding gauge 8. Fillet welding gauge 10. V-WAC Undercut Gauge 13.