Tired of wearing grooves in your aluminum belay gizmo...or "burning your fingers" while re-rigging multi-pitch rappels? The investment cast stainless steel V TWIN will last you a lifetime while providing top function for both belay and rappel where it's advantages will soon be realized. Stay cool - with the V Twins greater heat absorption and dissipation - and easily take in or pay out rope without hesitation or jamming. This is made possible due to a subtle division of functions. When the rope is un-tensioned it will pass smoothly thru the V Twin without hang ups or hesitation. In response to a plummeting partner, the sharp tug combined with a firm "belay hand" creates a bend in the rope locking it into tapered and teethed grooves. As with all belays and rappels vigilance is required!