The master lock zenex lockout non conductive padlocks have dielectric protection and are non sparking with either a composite nylon hardened steel or stainless steel shackle they are the optimal safety padlock designed exclusively for a lockout tagout system they are durable standardised substantial and identifiable for osha 1910147 compliance the lockout padlock has a zenex uv stable composite body and 6mm diameter composite nylon or 476mm stainless steel shackle it is corrosion and chemical