This is a set of 5 carabiners in different shapes and colors. The set includes different colors of the same size and some slightly different shapes. Materials: Zinc alloy, aluminum, etc. Dimensions are approximate due to amateur measurements, so please allow for some error. Can be used for hanging small items, keychains, etc. *This product is manufactured overseas. Although we inspect the items, unlike those made in Japan, there may be imperfections in the details, minor scratches, etc. Please understand this.