Features: Both ends of the swing swivels are make of high strength 7075 Aviation Aluminum, heavy duty, high strength, very enduring, wear resistant, corrosions resistant. Completely quiet, none noise, make your use more quiet and comfortable. The swing swivels is none friction and rotating 360 freely. Using sealed alloy steel ball bearings, the swing swivels is very compact and symmetrical at high speeds and prevents rope/chains kinking, hockling and twisting. If you like boxing, it can bring you the perfectly feeling of use; If you need to install a swing, hammock, tire swing, tree swing, hanging swing, disk swing, net swing, chair swing, children's hammock chair, swing swivels will make your family will have many fun. Also suitable for professional climbing, supporting multiple carabiners and a variety of rigging. It is also perfect to attach the swing swivels to your dog's leash and their harness to allow it to turn freely. Specifications: Component: 7075 Aviation Aluminum Size: about 5.4x11cm/2.13x4.33inch Package Includes: 1pc Rotational Device note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.