Maze STORMGUARD Nails have passed the ultimate test with flying colors - over 90 years of field service with a record unmatched by any other zinc-coating nail producer. The ultimate corrosion-resistance process exceeds the American Society for Testing and Materials specification A-153 for top-quality Hot-Dip Galvanizing. This specification requires all hot-dipped galvanized fasteners 3/8" in diameter or less to have a zinc coating thickness of at least 1 oz. per square foot of metal surface. This is a much heavier coat than common electroplated nails with only .2 mils deposit of zinc. All Maze Nails are made with high carbon, quality American steel to eliminate nail bending. The checkered heads enhance paint adhesion and the well-defined ring and spiral shank threading eliminates pop outs. The entire Maze Nail process is the result of an extensive program of research and "real time" testing in the field. Many other fastener manufacturers, packagers, and importers base their recommendations on accelerated salt spray testing. What they don't acknowledge is the ASTM Specification B117 which states, "There is seldom a direct relationship between the performance of hot-dip galvanized items in salt spray testing and the "real world". Our commitment to you is to continue to provide only top quality products - ones that we would be proud to use on our own homes. By insisting on 100% American-made Maze products - you can be certain that you're getting the best specialty nails available. Our mill treats you the way we ourselves want to be treated. Because we stand behind our product we warrant that all STORMGUARD Nails will not rust for the lifetime of your project when used in routine, residential applications not exposed to salt-spray or extreme, corrosive enviroments. Look for the nails in the Bright Red and Yellow boxes- you will not be disappointed! Maze Nails has weathered the test of time and will continue to be your quality source of specialty fasteners.