Designed for hygienic areas and suitable for all types of doors, the Fortress DMSK2 standalone, stainless steel, double door interlock has a minimal, smooth design to help reduce dirt traps while protecting workers from hazardous areas. In a typical operation sequence, the key is inserted into the lock and turned, the actuator is disengaged, and the door is opened. The key remains trapped until the door is closed, and the actuator is re-engaged. The double door interlock allows up to 2 trap keys. All internal contact components, actuators and keys are constructed using stainless steel.