Requires pilot hole to be drilled and installs using wrench or socket tool Prime-Line A307 Grade A Zinc Plated Steel 3/8 in. x 1-1/2 in. External Hex Lag Screws (100-Pack... Diameter & Length: 3/8 inch X 4 inch Dewalt Screw-Bolt (Hex Head), High Performance Screw Anchor Galvanized Stainless Steel Lag Screws Prime-Line 9056389 Hex Lag Screws, 3/8 In. X 4 In, Grade 18-8 Hex Head Lag Bolts For Deck Used in applications where standard wood screws cannot support the load, excellent for deck building where you can not use nuts 3/8" x 3" Hex Head Lag Bolts. 304 stainless steel. Used to fasten flip ups to in wall wood backing Much thicker than standard wood screws Wood screw with a 6-sided hex bolt head