IDEC HW1S Non-Illuminated Selector Switches are easy to use, easy to install, and available in a number of styles, including metal bezel, plastic bezel, and multiple colors and configurations. HW switches are easy to build, modify, maintain, and repair. HW switches mount into any 22mm round, mounting hole. Anti-rotation rings prevent switch rotation once it is mounted. Up to six contacts and wire contact blocks can be mounted separately for easy installation. IDEC HW1S Non-Illuminated Selector Switches also have a yellow safety lever lock to ensure contacts stay on the switch.