According to my experience, these screws are a great addition to my industrial and SCIENTIFIC tools. The binding feature helped to hold everything in place securely and firmly. The strength provided ensured that my projects wouldn't fall apart and the 15 pack was the perfect quantity for small projects. The only con I experienced was that they were a bit difficult to drill in, but once they were in, they held tight. Overall, I highly recommend this product for any projects that require dependable screws. .