(Also known as an Italian Hitch, the Munter Friction Hitch and the sliding ring hitch)
This is a very useful tool on a tower site. The hitch provides friction in one direction and easy flow in the other direction.
1. Take a vertical piece of rope.
2. Make a loop with the rope.
3. Bring one running end under and around the other.
4. Snap a carabineer around the two-legged running end side.
5. Tighten the hitch.