You are buying a lot of 10 clavos (nailheads.) All clavos are sold in sets of 10. We carry 7 sizes. These clavos come unfinished (rusty) in a rust patina. You can decide to just seal them (polyurethane) or paint them (rustoleum spray). These are easily hammered into wood. For hardwood, we suggest you pre-drill the hole with a very thin drill bit first. The length of nail. (what you hammer in) measure about 1-1.25 inches. Our Rustic Hardware line is a wonderful line that is handmade from hand hammered metal. We carry iron clavos (nailheads), strap hinges, rustic drawer pulls, squares, and much more.