Black Smooth Concrete Nails(FACTORY) Length:1/2"--6" (12--152mm) Dia:BWG 6--18 ( ... supply various kinds of nails, such as common iron nails, concrete nails, finishing nails, roofing nails, sinker nails, box nails, round ... staple nails, dry wall nails and plastic cap nailsBLACK AMOOTH concrete nailsSteel wire, flat countersunk head, diamond or needle point, flutes ...