Check the listing for details. 50Pcs 3/16"x1/2" Aluminum Blind Rivets, Countersunk Head Split Rivets, Black. Condition: New. Listed at 14.90 USD. Description:Material - The countersunk head rivets are made of aluminum alloy and zinc-plated carbon steel, which is rust-resistant, corrosion-resistant, and shock-resistant. They are stable and durable, so you don't have to worry about them rusting and deformingFeature - The core pulling rivet can quickly and easily establish a strong connection with two parts, and can be connected to various metal plates and pipes without damaging their surfaces. In addition, the mandrel that expands during installation can make the connection between the two parts more stableEasy to Install- The long blind rivets feature a self-plugging open design. Insert the blind rivet head into the pre-drilled hole of the connected parts, and then use a rivet gun to pull the mandrel into the rivet.