"This miniature circuit breaker lockout device is the standard pin-out model that can easily be installed with the aid of a push button - no other tools are required. It provides an effective and safe method for locking out miniature circuit breakers and offers superior chemical resistance.Type = Circuit Breaker LockoutMaterial = Glass Fibre Reinforced Plastic, Stainless SteelNumber of Locks = 1Lock Shackle Maximum Diameter = 7mm"