The Boeray Split Cotter Fastener Assortment is just what I needed for my industrial and scientific projects. As a result of using this assortment, I found that it covers a wide range of sizes and is very durable. The variety of sizes means I don't have to worry about running out of options. However, I wish there were MORE of each size in the package .Overall, I would recommend this assortment for any industrial or scientific application!