Ideal 44-783 Specifications: Compatibility: GE, ITE, Sylvania, Challenger, Bryant, Westinghouse, Square D (2/3 pole) and General Switch Co. multi-pole breakers with tie-bar switchIdeal 44-783 Includes: (1) Breaker LockoutIdeal 44-783 Features: Works with most major multi-pole breakers with tie-bar type switches Easy to install - thumbscrew secures and locks tie-bar in place No self-locking cable tie required