Their easy-to-use smooth, sealed finish won't collect dirt, snag rags, or cut fingers or tires. Easy to drill out, these rivets are perfect for oval track cars, sign construction, auto body repair, and many other uses. These blind rivets are made from high-quality materials and are available in a choice of colors. Rivet Size:3/16 in. Rivet Head Diameter: .386 in. Rivet Grip Range:0.040-0.354 in. Rivet Body Material:Aluminum Rivet Length: .906 in. Rivet Nail Material:Aluminum Mandrel Diameter: .114 in. Hole Size: .196 - .209 in.