These are anti-lost chain end buckle for glasses made of silicone and metal material. It has a reasonable design and practical functions, can be connected and fixed well, and has an excellent anti-slip effect. Made with excellent craftsmanship, will bring you a better experience. Features - Color: As shown -Material:Silicone, Metal - Size: 2.10X0.50X0.50cm/0.83X0.20X0.20in - Made of silicone which features with stability and durability, very hard and smooth for durable usage. - You can use these eyeglass chain holders together with eyeglass chains to help adjust the holding the glasses. - These practical eyeglasses chain ends can effectively prevent the loss of glasses and provide some convenience when you wear glasses for sports. - They can also be used as accessories for sunglasses to make you more sophisticated and fashionable. - The Eyeglass Chain End design is reasonable, this product is lots of eyeglass chains. Package list: Eyeglass Chain Ends