SENCO FASTENING SYSTEMS KD28APBSN 4000CT 3-1/4x.131 Nail 3-1/4" Length x 131" Diameter, Bright Finish, 20 Degree, Full Round Head, Plastic Collation, Framing Nail Comes with 4,000 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