The Münter hitch, also known as the Italian hitch, is a simple knot, commonly used by climbers and cavers as part of a life-lining or belay system. To climbers, this knot is also known as HMS, the abbreviation for the German term Halbmastwurfsicherung, meaning 'half hitch belay.' Therefore, carabiners used for this belaying technique are called HMS carabiners.