Our manufactory is sepecialized in producing Roofing Nail with Smooth Shank Or Twist Shank. Roofing Nail Features1)Diameter : 12BWG-8BWG.2) ... Length: 1.5"-3.5".3)Finish :roofing nails with umbralla ,smooth shank or twisted shank ,electric galvanized ... , hot dipped galvanized, bright.4)Model: Common nails, Roofing nails, Book nails,Square boat nails,Duplex Head Nails,Finishing ...