The Master Lock No. 497A Heavy Duty Safety Tags feature durable polyester laminate to resist water, grease and extreme temperatures. The heavy duty construction withstands over 50 lbs. (23kg) of pull force to meet and comply with the OSHA lockout/tagout standard. The 7/16in (11mm) diameter brass grommet accepts all safety padlocks. Tags are customizable with name, department and expected completion date.