100 Pieces per unit. Acrylic Rhinestone rivets are suitable for 8oz leather and other materials up to 1/8" thick. Use a rivet press, or set by hand using a mallet, and a pounding board. Synthetic rhinestones are quality acrylic, the metal frames are silver plated brass. The back cap is steel. Popular for leather belts, handbags and flip flops. This is an acrylic rhinestone preassembled in a tubular rivet. They are ready to set. Made of Copper Alloy. Made with Grade AA acrylic rhinestones. Suitable for belts or motorcycle gear. Rhinestone rivets are used for decorating leather belts; buckles; handbags; motorcycle gear or pet collars. They are also very popular in Western fashion. Non rusting means they can be placed on articles that will be washed or will get wet..