The Petzl Treesbee Friction Savers is designed to facilitate movement within the tree. The Treesbee anchor strap is used to improve rope glide at the anchor while protecting the tree from abrasion. It is designed for ropes with spliced terminations (the splice goes through the small ring). The galvanized steel rings provide great durability. Triple thickness of termination on large ring side makes the webbing more rigid for retrieval. Possible to install and retrieve from the ground. The wide, rigid webbing limits twisting. It is compatible with 30 mm retrieval ball.