Thank you for looking. Rock Exotica Omni-Block 1.1 (Single Pulley) I am selling this item as I purchased it a year ago and it has been stored unused. Please consider it. *The brand is listed as Petzl. This is an evolution of the swivel pulley, with a squared-off jaw added to the bottom of the swivel pulley to prevent prusiks from getting caught. It can be used as a pulley at the base of a mechanical advantage system, as well as a pulley at the A-frame anchor point, just like a regular swivel pulley. This pulley is so convenient that some organizations have adopted it as their standard team pulley. The pulley's swivel part automatically moves with the flow of the rope, preventing unnatural twisting forces on the equipment. Weight: 145gm Size: Length 107mm, Width 51mm, Thickness 22mm Breaking Strength: 23kN Applicable Rope Diameter: 13mm or less Certification: CE EN