With TWILOCK, HUMMEL is bringing on to the market a new quick-release fastening system for circular plug-in connectors, which is extremely simple and highly reliable. With one click, just a slight twist, the plug in system goes from "Open" to "Close" and locks, making it child's play to plug in connectors even where access is difficult. TWILOCK is resistant to vibration loads and guarantees protection of IP67/ IP69K (connected). The casing styles with male thread make it possible to use the new quick-release fastening system as well as the conventional threaded coupling. Transfer from one system to the other is therefore possible. TWILOCK is available in the M23, M16 circular connector series and in the TWINTUS plug-in system.