Vertical caving terminology and methods > Knots > Knot construction and behaviour
A hitch which can be easily tightened and released, allowing the friction to be controlled when it is tied around another rope. A friction hitch can slide up the rope when pushed up, but grips the rope tightly and remains static when one end is pulled. This allows it to be used as an ascender, where it is typically tied in a prusik loop or prusik tether. These are all commonly known as prusik knots, after the popular Prusik knot.
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