Concrete Steel Nails Features: 1) Diameter (mm): 1.2 - 4.5 2) Length ( ... kinds of nails, such as common iron nails, concrete nails, finishing nails, roofing nails, sinker nails, box nails, round wire spikes, fence staple nails, dry wall nails and plastic ... .52) Length (mm): 20 - 1003) Shape: steel wire, flat countersunk head, diamond or needle point, flutes or smooth shank4) Available: bright ...