Materials: Featuring an aluminum grip and steel mandrel, these components offer exceptional corrosion resistance, making them the perfect choice for use in any environment. STRONG HOLD: Large flange aluminum blind rivets increase the connection area with the board, distributing force more effectively. The thick shaft ensures a secure hold and a reliable pop when tightened. DIMENSIONS:Grip Diameter: 3/16" | Grip Length: 1" | Grip Range: 18.0-20.0mm | Flange Diamter: 5/8" PACKING: Includes 80 pieces of 3/16" x 1" pop rivets with aluminum large flange. WIDE APPLICATION: Our rivets are highly durable, making them ideal for both indoor and outdoor use. They are perfect to have on hand for various tasks, ensuring surfaces remain undistorted after the riveting process. They also offer excellent resistance to temperature variations.