VALUE WHEEL LOCKOUT - FITS 5"" - 6-1/2"" DIAMETER LOCK HOLE .375"" THIS STURDILY MADE LOCKOUT IS DESIGNED TO BLOCK VALVE HANDLES FROM UNWANTED MOVEMENT AND POSITION CHANGE. CONSISTS OF 2 FLATTENED HALF MOONS THAT COMPLETELY COVER THE VALVE WHEEL. MADE OF CRACK AND ABRASION RESISTANT DIELECTRIC POLYPROPYLENE. RESISTANT TO EXTREME TEMPERATURE CHANGES FROM -50° TO 360°F. MEETS OSHA 29 CRF 1910.147 REGULATIONS.