FastenMaster Headlok 0.172 x 4.5 in. Wafer Structure Screw, 50-Count features a stronger design with shear values surpassing those of 3/8" lag screws, making it i for demanding structural applications. The sharp gimlet point allows for quick and easy installation into wood and OSB, while the aggressive threading ensures superior holding power and withdrawal strength. Equipped with the innovative Spider Drive, this screw the highest level of bit engagement and drivability, reducing cam-out and improving efficiency. The wafer head design eliminates the need for a washer and provides enhanced pull-through strength, complemented by a chamfer under the head for added durability. Each package includes a Spider Drive bit and contains 50 screws, each measuring 0.172 inches in diameter and 4.5 inches in length. Finished with a corrosion-resistant coating and crafted from steel with a 0.191-inch shank diameter, these screws deliver reliable performance and longevity. Model Number: