Features:Brand new and high quality. HEX SHANK WOOD COUNTERSINK DRILL BIT 5 SET. 5 Of The Most Often Used Sizes For Carpenters, Cabinet , Furniture Makers And Other Wood Working Trades. This Very Good Quality 4 Set Which Includes The Following Most Popular Commonly Used Screwhead. Drills The Pilot Hole And Recess For Countersinking All In One Step. Fast, Smooth Cuts In All Types Of Wood And Plastic. Loosen Set Screw To Adjust Drill Bit Depth For Variable Screw Lengths. The Drill Bit Is Replaceable. The Generals Tool Accessories We Are Geared for the Hard Working Men and Women In the Field Please Review This Item With All Due Diligence. Advantage: the ability to replace the drill bit faster.