"This miniature circuit breaker lockout device is the tie bar lockout model that is easy to install with convenient thumbwheel - no other tools are required. It provides a safe and effective method for locking out miniature circuit breakers with superior chemical resistance.Type = Circuit Breaker LockoutMaterial = Brass, Glass Fibre Reinforced Plastic, Stainless SteelNumber of Locks = 1Lock Shackle Maximum Diameter = 7mm"