The wood twist drill with countersink efficiently drills, countersinks and deburrs in wood in one step. Mounted on a wood twist drill, all three operations can be done simultaneously. The countersink is suitable for hard and soft wood, for laminated and non-laminated chipboard and for plywood. This multifunctional drill made of tool steel has a countersinking angle of 90 degrees, five cutting edges and can also be used as a depth stop. The countersink includes a hexagonal pin spanner, a wood twist drill and a taper countersink mounted on the slip-on holder.