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