The ONLY Gauge You Will Need to Check Fire Door Assembly Clearance Requirements!   Contractors A sure way to check Fire Door Clearance Requirements before inspection   Inspectors Will speed up your inspections More accurate than a tape measure Compact and easy to use   Distributors Supply with job to ensure Fire Assemblies are installed per Fire Door Requirements   Owners/Facilities Manager To ensure your Fire Door Assemblies meet the requirements set forth by NFPA 80 - Current Editions   Checking life safety egress assemblies Checking other construction assemblies requiring specific clearances and operational tolerances