Located in BC, Tree Island is the largest domestic nail producer in western North America and buying Tree Island is buying Canadian. These flat head, diamond point galvanized ardox nails are for general construction where ease of driving and increased holding power is desired. Effective against shock loads and vibrations, holding power increases from 50% to 200%. These 5 gauge nails measure 5" and have a 3/8" head. Hot galvanization provides dual protection by serving as both a barrier coating and a sacrificial coating. Tree Island hot-dipped galvanized nails exceed ASTM A153 Class D. Hot-dip galvanized nails are recommended for use where high corrosion resistance is required such as outdoor exposure and for use with pressure-treated wood.