A microswitch has 2 limit switches operating together and sharing a common terminal . One limit switch is normally open and the other is normally closed. To be technically correct, the switch configuration is Single Pole Double Throw, or commonly referred to as SPDT. Specifications: Item Type : Switches Switch Type : Micro Switch Certification: CCC Model Number : CM-1704 Package Includes: 1 x Micro limit switch CM-1704 250V CNTD