Brighton-Best 1/4" x 1-1/2" Hex Head Lag Screws Zinc Plated - 100 per Box (486118)1/4" Diameter1-1/2" Length (Length is measured from under the head)Grade 1 Low Carbon Steel Hex Head Lag Screw (Meets SAE J429 & ASME B18.2.1)Zinc Plated to meet ASTM...