This high-quality fender washer is designed to distribute the load of a fastener more evenly across a wider surface area, ensuring a secure and stable connection. Made from durable zinc-plated steel, it offers excellent resistance to corrosion, making it ideal for both indoor and outdoor use. With a 5/16-inch diameter and a 1 5/8-inch size, this pack of 100 washers is perfect for various automotive, plumbing, and construction applications, providing reliability and ease of use for your projects.