Square Clavos, 1/2" x 1/2", Distressed, Oil Rubbed Bronze finish, 10 Pack Square Clavos with pitted distressed surface 1/2" X 1/2" size with heavy duty iron nail inserted during casting process (Quality made!) Head is made of zinc alloy and will not rust. Resembles old bolt head. Premium quality, these are not weak upholstery tacks, nail shank is 1/8" thick and 3/4" long