CT HMS Carabiner | Gray with Green GateHMS carabiner with Double T beam construction. Large HMS carabiner with wide opening and triplex twist lock gate, made of hot forged light alloy, designed for use in mountaineering, recovery maneuvers and rescue operations. Main technical features: Shape guarantees correct axial loading relative to rope and other devices; Large size and ample width to allow use of Munter hitch knot, the securing of more than one rope, slings or devices and rope