... is a pin-shaped, sharp object of hard metal or alloy used as a fastener. Formerly wrought iron, today's nails are typically ... "mild" steel (about 0.1% carbon, the rest iron and perhaps a trace of silicon or manganese). Nails for concrete are harder ... , tacks, brads, and spikes.We have all kinds of our own designed nails,iron wire,and mesh,meantime,we are able to ...