[Size] - Outer Diameter: 23mm; Height: 2.5mm; Thickness: 1.5mm [Stable to Use] - Double loops design makes them easy to open and attach keys or other items on. Use pliers when necessary [Plating Surface] - Surface finish process to ensure the color and luster and the surface not easily rust and distortion [Function] - The split ring is flat and keeps securely closed, providing strong fastening and no need to worry about your keys falling apart [Applications] - Widely used on organizing your car & home keys, lanyards, zipper pulls, handbags, purses or other arts & crafts or gifts making