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.