Petzl Torse EASY TO USE: The TORSE shoulder strap has a simple construction and is used to help position your rope. BUCKLE UP: Rapid buckle facilitates placement and removal of the strap on the harness. ADJUSTS EASILY: The TORSE features a DoubleBack buckle for quick, precise adjustment. EXTRA STRENGTH: Superior quality webbing for excellent durability. DURABLE MATERIAL: The TORSE is made from aluminum DoubleBack adjustment buckle, plastic rear buckle, and abrasion resistant polyester webbing.