We specialized in Concrete/Cement Nails: Flat Coutersunk Head,Semicircular Head,K type,T type. Diamond Point. Shank:Smooth, Fluted,Twisted,Bamboo-Joint. Finished:Bright,Eletro Galvanized,Hot-Dipped,Blacked,Blued,Colorized. Size:length 1"-4"; dia. 2mm-4.2mm. we will offer you most competitive prices and best quality. Welcome your specific inquiry.