#7 x 1-5/8" Simpson Strong-Tie #1 Square Drive Trim Head Deck Screw - 316 Stainless, Pkg. 5 Lb.The Simpson Strong Tie Trim Head Square Drive Wood Screw is built for decking applications where both strength and appearance matter. Designed with a low profile trim head that sits flush with the surface, it provides a clean, professional look while holding deck boards securely in place. A Type 17 point ensures fast starts, and coarse threads along the shank pull boards tightly to joists for a strong, lasting connection. Engineered for reliability,