Big Horn 18939 #11 5pc. Countersink set W. L. Fuller 10393011C

Features: For wood screw sizes #6, #8, #10, #12, and #14, Countersinks combine pre-drilling for screw threads and clearance drilling for screw shank, Countersinks combine counterboring for wood plugs (if needed) and countersinking for the screw head, Plug cutters produce wood plugs to match their counterbores, High Quality, Manufactured by W. L. Fuller, Inc. | Made in USA.