I hope I can explain this well enough so you know what I am asing about. My question is i want to know what it is actually called as i can only hope to explain what i am looking for since i don't know what its called. I am looking for something that is like two handles that you can use to climb up a rope, they are like two different, left and right, handle that you can use to climb a rope and said item grips is when pulling down locking it in place on the rope by means of friction, i mean when you put your weight on them it locks it on the rope put you can release the pressure and move the handles and yourself up the rope, you use two of them so when you are sliding up one handle the other holds you in place. I hope i explained that close enough to what i am looking for so you have a idea what i am talking about, thanks for any help/info. and have a wicked good day.