Excerpt from Stewart Green, a senior guide for Front Range Climbing Company The Münter hitch works by creating friction from several bends in the climbing rope which threads through a carabiner. It’s best to use a large pear-shaped locking carabiner since the hitch inverts when you either take in or give out rope. Only use the knot with a locking carabiner, preferably an auto-locking one, since the action of the knot pulling in the carabiner can cause a screw-gate carabiner to come undone. If you do use a screw-gate, tighten it down and check it often. The knot is easy to tie with practice and works well. The primary drawback to the Münter hitch is that it kinks and twists the rope. If you use a Münter hitch for rappelling, it’s recommended to use it mostly for short rappels because as the rope runs across itself, it can create excessive friction that could damage the rope’s sheath. I have used the Münter on many occasions without issue. Nevertheless, the caution to use with a locking or auto-locking carabiner, to check it often and (I might add) to tie the hitch so the live end is opposite of the gate (as shown in Green's image) all of which should not be taken lightly. Unfortunately, I was educated on this at the school of hard-knocks a few years back when, on a 20’ nuisance drop, the feeding motion of the rope moved the hitch around the biner while simultaneously unlocking the gate (which may or may not have been very tight). I did not actually see it happen but I did hear the distinctive sound of the gate click open followed by a hasty descent. At the bottom the rope was looped around the biner, but no friction hitch. Reminded again that nylon is a fairly effective abrasive on human flesh...second lesson learned that day.