1/4" diameter structural wood screw used to install deck ledgers to band joists and meet requirements of building codes. Double-barrier coating (equivalent to hot galvanized) is suitable for outdoor and some preservative-treated wood applications. Only ledger fastener with solutions provided for various engineered wood product band joist materials. Heat-treated carbon steel. 3/8" Hex washer head is stamped with No-Equal sign and fastener length. No pre-drilling required. 25 per pack.