Buckleguy carries tubular rivets in multiple sizes and in the following finishes: brass, antique brass, nickel plate, and nickel matte. These are solid brass rivets that are used with leather, fabric, and other materials. The rivets are measured by the post length. As a rule of thumb you want roughly 2mm of the rivet post sticking through the material on the other side. We also sell the rivet setters and presses to help with installation.