The DTT2SS is made from stainless steel for applications in higher exposure environments. Whether it’s a deck guardrail post application or the lateral-load connection from the deck to the adjacent structure, the stainless-steel DTT2SS is the best choice for seaside applications or those calling for more corrosive preservative-treated lumber formulations. It fastens to the framing members with stainless-steel Simpson Strong-Tie Strong-Drive® SDS wood screws (included). DTT Stainless-Steel Deck Tension Tie for 2x with 2-1/2 in. SDS Screws (Pack of 20).