Travers Tool offers many styles of countersinks (countersink drill bits) that open up the top of an existing drilled hole to allow for the head of a flat head screw to sit flush. The zero flute style can also deburr the top of an existing hole. Countersinks are supplied in the following styles: zero flute, single flute, three or four flute, six flute, drill point &CNC. Choice of tool materials include: solid carbide, cobalt & high speed steel. Travers sells many popular brands of countersinks such as: M.A. Ford, Keo, Everede & others.