Concrete Nails is Best in Class Quality is manufactured in Medium Carbon Steel. For best performance, it is Electro galvanized & Heat treated. It can be directly used in hard media, such as Concrete, Bricks, etc. Directly hit in your home wall & hang Clock, Wall Hanging, Photo Frames, etc Package included : (1" inch -20 pcs , 1.5" inch -20pcs , 2"inch -20 pcs , 2.5" inch -20pcs , 3"inch -20pcs) Pack of 100 Pieces