Dual Direction Fast Release Countersink Drill Bit Combines countersinking and screwdriving in one tool, with an integrated chamfering tool and adjustable depth to match project needs, improving workflow on wood, fiberboard, or metal sheets. Precision Positioning and Stability Internal hex screw locks the slot securely for flexible adjustment of drilling angles. Wearresistant clear markings support consistent alignment and accurate results with different drill setups. Versatile Compatibility Across Tools And Materials Fits bench drills, handheld drills, and standard lithium ion drills. Processes wood, plywood, particleboard, fiberboard, and thin metal, making it a practical choice for varied workshop projects. Set With Multiple Sizes And Features Works with center drill dimensions of 2.8mm, 3.0mm, 3.2mm, and 3.5mm, plus dualsided cutting edges and limiter. Combines with 8mm or 10mm shank specifications to meet diverse operational demands. Use scenarios Furniture assembly: predrill countersunk screw holes in wood or plywood panels to achieve flush screw heads and clean joints. Cabinet and hardware installation: drill precise pilot holes and countersink for hinges, brackets, and fittings. Light metal and composite work: countersink and pilot drill thin metal sheets or fiberboard for accurate screw seating.