<p>Honeywell Switch Accessory LSZ51B is designed to be used with HDLS series switches. It has a standard roller lever. This Rotary Switch Accessory is non-illuminated and is typically used in a variety of transportation, industrial, mechanical and medical applications.</p><p> A Rotary Switch is mainly used to change the operating status of an electrical or mechanical appliance from ON to OFF and vice versa. Switch accessories are electromechanical switch devices, which are used to make or break contacts in an electrical circuit. They act as a physical interface between the electrical system and the real world.</p>