There's two kinds of hex screws: An Allen screw incorporates a hexagonal indent in The pinnacle, demanding an Allen wrench, and the other sort has no indent while in the hexagonal head and need to be used or removed using a socket wrench. The size of such screws differs, but https://woodscrews10863.liberty-blog.com/28561618/5-tips-about-screws-you-can-use-today