Innovative patented GRIP TIGHT™ design effectively locks out circuit breakers. Adjust to breaker with simple thumb turn and then close clamping handle for a tight grip on the toggle. Great strength with universal fit. Compact device is easy to carry and easy to store. Accepts all American Lock and Master Lock safety padlock shackles and lockout hasp diameters. Durable construction with powder coated steel and reinforced polymer for operation in harsh environments.