... various screws and nails. Types: galvanized WOOD nails SQUARE head, galvanized square boat nails, common round iron nails, roofing nails, concrete nails, and round washers ... sample. Besides, we also produce many other kinds of nails and screws, such as drywall screw, chipboard screw, ... self-tapping screw, self-drilling screw, concrete nails and so on. Please feel free to contact me; ...