The IDEAL 44-809 Universal 277V Single-Pole Breaker Lockout (Card of 3) is a hinged single-pole locket with a locking post design, it will lock the lever in the off position to isolation to isolate and prevent breaker use. This universal model features a unique screw clamp that will lockout all single-pole breakers. In 1916, J. Walter Becker started the Ideal Commutator Dresser Company of Chicago from his mother's kitchen. He manufactured commutator dresser stones with the belief that every product should be worth more than the price paid for it. Service, he said, was part of the product. That idea has been the core IDEAL business principle for over 90 years. Today, the many loyal distributors and customers that make IDEAL successful are a testament to Becker's original philosophy.