Leather workers and DIY folks, these copper rivets are the real deal! This quarter-pound box gives you approximately 34 pieces of 5/8\ length #9 rivets with matching burrs. The copper construction is naturally rust-proof and seriously heavy duty - these aren't flimsy hardware store rivets. Each rivet has a 1/2\ head with a 5/32\ (4mm) tube diameter, perfect for belts, halters, bridles, bags, collars, bracelets, and pretty much any leather project needing permanent reinforcement. They work great on canvas and other sturdy fabrics too. The installation is straightforward but you'll want a proper rivet setter tool - we recommend the heritage rivet-setter for best results. Pro tip: it's better to have a rivet that's slightly too long than too short (you can always trim about 1/16\ above the burr if needed). These are the exact same rivets used in professional leather shops - I've seen them hold up on pack equipment that gets seriously abused. The copper develops a nice patina over time too, which looks awesome on leather goods. Whether you're making new gear or repairing old favorites, these rivets provide that solid, permanent connection that stitching alone can't match. The quality is immediately apparent when you work with them - no malformed heads, consistent sizing, and they set cleanly every time. If you're serious about leather craft or need reliable hardware for heavy-duty repairs, this is definitely professional-grade stuff that won't let you down.