Clamp-on breaker lockouts are versatile and easy to install using the proprietary thumbwheel design - no screwdrivers needed! Extremely versatile - works on a wide range of single-pole and internal-trip multi-pole breakers. Detachable cleat (included) expands the range of applicable breakers. Equipping your employees with the proper lockout tools and warning devices can save lives, reduce lost employee time, and cut insurance costs. Brady® is a world leader in lockout/tagout products and services offering industry expertise and a broad range of durable, easy-to-use lockout devices.