The one I saw screw locked.
I don't have one.
It helps take the twist out of your rope as you maneuver through the tree.
I prefer my small Petzl swivel when needed.
Is the one you have Screw or Auto Lock?
No cash out of my pocket for this swivabiner , it was given to me from a friend who found no use for it. I guess I'll clip it on my boss bag for now... Unless some one wants to make a trade for it !! It's brand new Thanks Tree Buzz amigos