The GE SEFHM2 is a TDM door-mounted operating handle with fixed or adjustable shaft. Complete Mechanism with NEMA 1/3R/12 Handle for SE150, SF250 circuit breakers. Box depth: Extended Shaft, SE150: 6 1/8" - 15", SF250: 7 3/4" - 15 1/2". UL Listed (File E-57253).