There are 2 varieties of hex screws: An Allen screw features a hexagonal indent in The pinnacle, necessitating an Allen wrench, and the other style has no indent from the hexagonal head and has to be applied or taken off using a socket wrench. The size of those screws differs, https://wood09853.vblogetin.com/33571603/wood-screws-things-to-know-before-you-buy