UNIFORM COUNTERSINKING: Pre drill, countersink, and counterbore in one step. Fits all standard drills and impact drills with 1/4 chucks. Perfect for where the screws are on show, or to make deeper counterbores to disguise their position with matched wood plugs 1/4-INCH HEX SHANK: As part of the Trend Snappy range, the 1/4inch hex shank is compatible with The Trend Snappy Chuck and other quick release systems for fast swapping between accessories for increased efficiency WIDE APPLICATION: Quick and accurate professional finish; Countersink and counterbore for suitable plug to be fitted over the screwhead; Secured with hex wrench for easy replacement and adjustment; Adjusted to suit timber thicknesses or screw lengths ADJUSTABLE COUNTERSINK: The Adjustable Stop Collar allows you to adjust the Counterbores depth and Adjustable Cutters can be adjusted for many screws sizes COUNTERSINK DRILL BIT SET: 5 Piece countersink 4 (7/64 inch), 6 (9/64 inch), 8 (11/64 inch), 10 (3/16 inch), 12 (7/32 inch); Tapered drill bit HSS M2 (Grade 6542); 4 cutter 45 Carbon Steel