In electrical engineering, a limit switch is a switch operated by the motion of a machine part or the presence of an object . A limit switch can be used for controlling machinery as part of a control system, as a safety interlock, or as a counter enumerating objects passing a point. Specifications: Type of contact Spdt Mark Electronic component Switch type Limit Switch, SPDT Terminal SPDT Package Includes: 1 x Micro Limit Switch Lever Arm Long CNTD CM-1701