Detailed Product Description Double Head Nail:Double headed, smooth shank, diamond shank, bright finish. Duplex head nails application: Duplex head nails are used for ... temporary construction, such as form work or scaffolding. The double head on this nail makes it easy to pull out when ... or scaffolding are torn down. Duplex Head Nails Size: Length (mm) Wire dia: (mm) Head dia: (mm) 53--116 2. ...