Aluminum siding nails - plain shank style. Will not harm trees or saws. 2-1/4" long with .128 diameter shank and 3/8" diameter head. One pound box - approximately 333 nails. WHY ALUMINUM NAILS? The use of aluminum mounting nails prevents corrosion problems and rust marks that occur when steel nails are used. The use of aluminum nails is also safer when your sign is being nailed to a tree. If the tree is ever harvested, saws will cut through aluminum nails easily, preventing harm to both the saw blade and sawyer. HOW TO USE? Leave the nail a little short of "all the way in," about 3/8" left to go, so that a few of the rings on the nail shank still show. This leaves room for the tree to grow out, while preventing the sign from being pushed off the nail, and keeping the sign mounted longer. Aluminum Nails for Posted Signs 2AKAET$5.25, 10/$42.50 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.