There are 2 forms of hex screws: An Allen screw provides a hexagonal indent in The pinnacle, necessitating an Allen wrench, and the opposite form has no indent from the hexagonal head and need to be used or taken off that has a socket wrench. Thread forming screws are comparable https://timcoscrews12355.suomiblog.com/the-basic-principles-of-wood-screws-44157396