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Overview
【Countersink Drill Bit】Five different sizes of long tapered twist drill bits, efficient drilling and fast chip evacuation 【Superior Design】Equipped with a hex wrench, convenient to adjust the chamfer position and control the drilling depth 【Excellent Production】High-speed steel drill bits, strong and heat-resistant; hard steel chamfer, wear-resistant and durable 【Compatibility】Universal 1/4" (6.3mm) hex shank suitable for most hand electric drills on the market 【Uses】Mainly used for punching and chamfering of plastic, PVC, rubber, wood