... ", BWG20-BWG4. 2) Material: made of high-quality low-carbon-steel and stainless steel.3) Finish: electric galvanized, hot dipped galvanized, bright, flat ... shank..4) Model: Common nails, Roofing nails, Book nails,Square boat nails,Duplex Head Nails, Finishing nails,Coil Nails,Cement Nail ...