The Macsim 10g 304 Stainless Steel Trim Head Deck Screws are engineered for high-performance durability and a professional aesthetic. Featuring a Type 17 (T17) point for rapid timber penetration without pre-drilling in many softwoods, and a square drive to prevent cam-out, these screws are the professional choice for outdoor timber decking.
Source: Macsim Fastenings Technical Specifications