Stainless Steel Screws for Hardwood, Cedar, Redwood and Pressure Treated Decking Deckfast Stainless 305 screws for hardwood, cedar, redwood and pressure treated decking are extremely versatile, premium quality deck screws. They feature extra deep star drive recesses, type 17 auger tips, and trim or reinforced flat heads. For hardwood, cedar, redwood and pressure treated decking. Smart-Bit® compatible. Grade 305 Stainless Steel Trim or Reinforced Flat Head with Nibs Star Drive Type 17 Auger Tip