Tandy Leather | Steel Double Cap Rivets Medium 100Pack #1373-16 | Antique Nickel PlateTandy Leather Steel Double Cap Rivets Medium 100Pack #1373 16 Antique Nickel Plate Extra Small: Cap 1 4" (6 mm), Post 3 16" (5 mm), Base 1 4" (6 mm) Small: Cap 1 4" (6 mm), Post 1 4" (6 mm), Base 1 4" (6 mm) Medium: Cap 5 16" (8 mm), Post 5 16" (8 mm), Base 5 16" (8 mm) Large: Cap 5 16" (8 mm), Post 1 2" (13 mm), Base 5 16" (8 mm) Steel. When only the best will do, these rivets offer the finished look that only double cap rivets can. Use setter #8100