Fusion Climb Tree Swing Hammock Trampoline Bungee Aluminum Alloy Swivel Ring Shackle Device Black Aluminum / Stainless Steel 1 Oval Swivel Meets EN 362 standards Durable high density aluminum alloy mounted onto sealed stainless steel ball bearings Room for multiple carabiners to easily clip in back-ups or transition from one anchor to another. Dimensions: 4.5" x 2.05" x 1.3", MBS: 36KN