L.H. Dottie LAG144 Lag Screw, Hex Head, 1/4-Inch Diameter by 4-Inch Length, 7/16-Inch Hex, Zinc Plated, 100-Pack Lag screws Hex head Zinc plated steel 1/4-Inch diameter by 4-Inch length, 7/16-Inch hex Used in woodworking when standard wood screws are too short or too small