Countersink Bit

This set of "fuller" bits includes everything necessary to drill and countersink screws from size #6 to # 12. Each bit has an adjustable countersink collar and a depth-stop which allows you to properly pre-drill holes for screws of a variety of lengths. Also included in this set are two plug cutters which will cut the appropriate size plug to fill the countersunk hole that the bits have cut. Often used by boatbuilders and cabinetmakers, this is a high quality set. It is possible to buy less expensive versions of these bits, but it is worth the price if you plan to use them often.