The Machine Phillips Internal Tooth Threaded Threads are an excellent choice for fastening applications. My analysis of this product showed that these screws are incredibly strong and provide a secure hold in a variety of materials. Additionally, the internal tooth design prevents loosening over time, making them a reliable choice for long-term use... The only downside is that they may require a specific driver to install properly. Overall I highly recommend these screws for any project requiring strong and secure fastening..