The countersink mounted on the attachment holder efficiently drills, countersinks, and deburrs in wood in one step. When mounted on a wood spiral drill, all three applications can be performed simultaneously with professional results. The countersink is suitable for both hard and soft wood, laminated and non-laminated chipboard, as well as plywood. This multifunctional drill made of tool steel features a countersink angle of 90 degrees, five cutting edges, and can also be used as a depth stop. It includes a hex key. The wood spiral drill is not included in the delivery.