Maze STORMGUARD HD8 Series HD8050 Cement Siding Nail, Hand Drive, 8d, 2-1/2 in L, Carbon Steel, Hot-Dipped GalvanizedThese specially engineered nails are recommended for face and blind nailing many types of fiber cement siding such as Allura or HardiPlank. The STORMGUARD double hot dipped galvanized coating on these nails ensures excellent long term rust protection. These nails meet the blind and face nail specification for lap siding 8 1 4 in or less. Wider width sidings require blind (roofing) nails. Unit: POUND UPC: 098342712903 Model Number: HD8050