◆ Other recommended keychains here ▷▷ Double-loop brass double ring keychains, set of 20 Color: Gold Sizes: Outer diameter 15mm, 20mm, 25mm, 30mm (Please specify your desired size in the comments after purchase) The material is solid brass, and the more you use it, the more it will develop a tasteful gold color, allowing you to enjoy the aging process. Use them to connect keys, carabiner key rings, wallet chains, and keychains, or for customization.