Allen screw terminalsMaterial: PA6/ABSContacts: Nickel-platedMechanical connection locking: - After the plug is connected and the switch is turned ON, the plug is locked - After the switch is turned OFF and the plug is pulled out, the control is lockedIn ON or OFF position of the control it is possible to put a padlock for security purposesWith 4-module DIN-rail and hinged windowIP67 Watertight