Type of knot:
To suspend a climber on their rope within a double rope system and allows the climber to ascend and descend by moving the hitch in the desired direction.
Can be tied around both sections of a rope to be able to ascend using static footlock technique.
Can be tied to a rope to create an attachment point for a pulley when setting up a 3-1 pulling advantage.
This knot is one of the original friction hitches of which many variations have come from. It is a very predicable hitch and can be tied with 4 wraps, or 6 wraps for extra hold.