The adjustable grip hitch is my all-time favorite end loop knot. It forms a loop that is adjustable in size, will hold its size unless you adjust it and is super easy to tie. The adjustable grip hitch is a knot used when you need to hold a load on an end loop but the loop size can easily adjust the loop size when unloaded. It is important to note that the knot will slip when shock loaded until tension is relieved enough for it to again hold firm.
Pictoral How To Tie An Adjustable Grip Hitch