Brad Point Drill Bits - 6.0 to 9.7mm

Item#: PM-DBA
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Product Detail

前端研磨成三點尖, 容易看見小木條斷面旋轉圓徑, 可在車床上鑽打長而深的孔, 鑽孔時進刀速度不能過快, 並且適時退出鑽刀排屑, 鑽出的孔徑就能準確不會擴孔. 材質: 高速鋼