Material: SteelFinish: GalvanizedGauge: 18Size: 3-1/8" Wide X 7" Tall X 2" BaseJoist Size: Double 2" X 8"Features Double-Shear Nailing Which Distributes The Load Through Two Points On Each Joist Nail For Greater StrengthNails Must Be Driven At An Angle Through The Joist Or Truss Into The Header To Achieve Maximum LoadGalvanized Coating To Resist Corrosion