Product details:

This set of Fuller Tapered Drills includes all the bits needed for proper installation of the most often used #6, #8, #10, #12, and #14 wood screws. You get 5 HSS tapered drills, 5 countersinks, 2 stop collars, 3/8" and 1/2" plug cutters, and 2 Allen wrenches plus a finished hardwood case for protection and storage. American.