1.[SIZE & PACKAGING]: The riveting range of the blind rivets is 0.31-0.4 inch, the body size is 4.8 x 14 mm / 3/16'x1/2' (Dia x L), the mandrel size is 3.1 x 46 mm / 0.12' x 1.81' (Dia x L), the cap size is 16 x 2.5 mm / 0.63'x 0.1' (Dia x T), and the package includes 100pcs of aluminum blind rivets 2.[MATERIAL]: The aluminum blind fastener is made of aluminum alloy and zinc-plated carbon steel, which is rust-resistant, corrosion-resistant, and shock-resistant. They are stable and durable 3.[FEATURE]: 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 stable 4.[EASY TO INSTALL]: 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. The rivet can be firmly and stably locked in place. Large Flange rivets a wider bearing surface and are good for brittle or soft materials assembled to rigid surfaces