Drill and countersink in one operation with this Fisch Hex Drive Drill and Countersink Set; giving simple, fast working to achieve a clean finish. Fitted with 1/4" hex shank to fit any quick change system including Festool's Centrotec. These combined countersinks come fitted with high speed steel drill bits that can be adjusted for different length of screws. As well as a countersink, they will also produce a counterbored hole. Made in Austria from heat treated steel. Supplied as a set of 3: #6 (3mm) Screw 2.4mm drill #8 (4mm) Screw 2.8mm drill #10 (5mm) Screw 3.2mm drill-bg