6 x 6, 18 Gauge, Steel Post Column Base, Secure The Bottom Of Posts Or Columns To Concrete Are Perfect For Decks Or Patio Covers, Positive Connection For A Post To A Wood Deck, Stronger Than Angled Nailing Or Screw Fastening, Reduces The Chance Of The Post Splitting Eliminates Nailing Into End Grain, ZMAX Galvanization Offers Extra Corrosion Resistance For Exterior Treated Wood Applications, Install With 16D Common Nails