These washers are a must-have for any industrial and scientific project that requires bolts. As my tests showed, they hold up well under heavy pressure and have a durable build that ensures long-lasting use. plus the smooth surface of the washers offers a polished finished look. The only con is that they can be a bit pricier compared to other washer options, but the quality is worth the investment. Overall, I highly recommend these washers for anyone looking for reliable and sturdy fasteners. .