The HONEYWELL part ADA3721R is a premium large basic switch accessory from the MICRO SWITCHâ„¢ BZ Series. It features a durable sheet metal mounting bracket with a 58 mm [2.281 in] hardened steel roller lever auxiliary actuator. The tang on top of the actuator can be easily bent to adjust the operating point and free position according to your specific needs. The mounting hardware is furnished unassembled for easy installation. This high-quality accessory provides reliable and precise actuation for various applications.