There's two forms of hex screws: An Allen screw includes a hexagonal indent in the head, necessitating an Allen wrench, and another type has no indent from the hexagonal head and has to be applied or taken off using a socket wrench. Never to be puzzled with stability torx, star https://screws20752.theblogfairy.com/28130453/top-latest-five-wood-screws-urban-news