Drill bits with countersink

Drill bits with countersink are usually spiral drill bits for wood that incorporate a countersink. This countersink has an inner hole with the diameter of the drill bit to allow its passage, keeping both centered on the same axis.

Additionally, they usually incorporate a hex head screw that allows adjusting the position of the countersink along the spiral drill bit. In this way, we can adjust the depth of the hole made by the bit before the countersink performs the countersinking in the wood.