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Flat-Bottom Drill Bits
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Flat-bottom drill bits create holes with flat bottoms. The bits shear material as they drill a hole, which minimizes burring at the hole's exit and leaves a smooth finish on the hole. This often eliminates the need for a finishing pass after drilling. Flat-bottom drills are also used for counterboring holes, drilling holes at an angle, and creating intersecting holes and half holes. They can be used for drilling inclined and rounded surfaces, shoulders, or thin plates.