Hey DIYers and pros! These Metal Magery closed end rivets are the real deal. The closed end design creates a watertight seal that's perfect for boats, aircraft, race cars, or any project where leaks would be a problem. Made with 100% aluminum bodies, they're seriously corrosion-resistant - even in saltwater environments. The steel mandrels provide strong holding power, and the thick shaft ensures they won't pop out once set. With a 1/4\ diameter and grip range from 1/16\ to 1/4\, they handle most applications beautifully. The head diameter is .512\ for good coverage, and you get 50 pieces in the pack - plenty for multiple projects. Whether you're working on john boats, airplane repairs, or custom car builds, these rivets deliver professional results. They're the highest quality you'll find, strong enough for structural work but corrosion-resistant for marine use. Keep a pack in your toolbox - you'll be surprised how often you reach for them!