Set of 3 HSS 90° countersink drill bits with hexagonal shanks — designed for accurate, durable woodworking countersinking and chamfering Key benefits Durable cutting performance: Made from high-speed steel (HSS) to stay sharp under repeated use, reducing the need for frequent replacement. Precise 90° chamfers: The hex chamfer design produces clean, consistent 90° countersinks so screw heads sit flush and finishes remain neat. Secure, fast bit changes: Hexagonal shanks provide a positive grip in hex chucks and quick-change holders, minimizing slipping and speeding tool changes. Versatile three-piece set: Offers options for different hole sizes and tasks so you can pick the right cutter for each job without stopping work. How this solves common woodworking problems Eliminates tear-out and splintering at screw locations by creating accurate, clean chamfers. Speeds assembly by combining pilot hole finishing and countersinking in one pass. Reduces wobble and bit slippage during drilling thanks to the hex shank, improving safety and hole consistency. Compatibility and performance Material: High-speed steel (HSS) for strength, edge retention, and balanced wear resistance. Geometry: 90° hex chamfer for standardized screw seating and clean finish work. Fit: Hexagonal shank fits common hex chucks and quick-change adapters used on cordless drills and drill drivers. Typical applications Installing cabinet hardware and countersinking screws for flush-fit finishes. Preparing holes for hinges, knobs, and door hardware where neat chamfers prevent binding and visible damage. Finish carpentry and trim work—clean countersinks and chamfers for visible surfaces and screw concealment. What you get Three countersink drill bits constructed from HSS with 90° hex chamfer geometry and hex shanks, ready for woodworking tasks that demand accuracy and durability.