1. Premium Aluminum RivetsAll of our pop rivets are made of highquality aluminum and steel. They have great performance in any environment due to corrosion resistance and acid resistance, without the worry of rusting and breaking. 2. 500pcs 14 Standard SizesThis pop rivets assortment kit includes 500 pieces in 14 most used sizes for your various needs. It contains 45pcs 3/32' x 1/4', 45pcs 3/32' x 5/16', 35pcs 1/8' x 1/4', 35pcs 1/8' x 5/16', 40pcs 1/8' x 3/8', 40pcs 1/8' x 1/2', 40pcs 5/32' x 5/16', 40pcs 5/32' x 3/8', 40pcs 5/32' x 1/2', 30pcs 5/32' x 5/8', 30pcs 3/16' x 5/16', 30pcs 3/16' x 3/8', 25pcs 3/16' x 1/2', 25pcs 3/16' x 5/8', with a total of 500pcs. 3. Reinforced Labeled CaseThe pop rivets assortment kit is well packed in a reinforced labeled storage case with thickened latch and dividers. The 14 sizes are separately placed in 14 grids, being handy and neat, orderly and not messy. 4. Great PerformanceAdopting selfplugging open end design, with 14 SAE sizes, it is well matched with the rivet gun. It has a smooth surface, is strong and handy, and is easy to install. These black rivets are perfect for joining all kinds of metal plate and pipe, being durable and not deforming.