With copper rivets, the soft metal allows for a larger head, which over time keep the leather from pulling over the rivet and thus increases the saddles longevity. Each broad-headed rivet sits flush against the surface of the leather and therefore must be precisely hammered by hand to prevent any damage to the leather top during manufacture. These rivets may also be re-hammered over time to remain flush with the saddle surface. Steel nickel rivets are used on our more economical options and are machine pressed in the factory. These have the advantage of reduced cost, and are perfectly suitable for many types of use.