Universal Multi-Pole Breaker Lockouts are made of durable impact-modified nylon and are compatible with most two or three pole breakers with a tie-bar. Simply tighten the thumbscrew to clamp the Breaker Lockout securely over the tie bar, then insert the lock to prevent the clamp from being loosened. This lockout device isolates and secures circuit breaker switches to protect employees against electrical accidents during equipment maintenance. 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.