3" x 120 Full Round Head, Hot Dipped, Galvanized, Ring Shank, Framing Nail. Comes with 2,500 to a pack. Applications include framing, trusses, subfloors, sheathing, decking, siding, fencing, pallets, crate assembly and wood to concrete. Fewer tool jams when using Serco nails compared to competitive products. Highest withdrawal value for fasteners.