Pit Bull CHIBP7608 Countersink Drill Bit Sets in a Case (22 Piece) Go to amazon.com Related posts Best countersink bit Best countersunk bits FeatureMade for screw sizes: #5, #6, #7, #8, #9, #10, and #12Includes flip top wooden case7 countersink bits, hex bits, and storage box DescriptionAJ 22pc Countersink Drill Bit Sets is a drill bit set that comes packed in a wooden case.