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Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 21Pcs M35 High Speed Steel Twist Jobber Drill Bits 1/16"-3/8", with Metal Index Storage Box
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Sinyeenglon Cobalt Drill Bit Set for Hardened Metal Features
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M35 Cobalt 5% Material: High cost, but hardness is up to 67, cut faster and has a long life, up to 12 times compared with the average HSS titanium coated bit
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Hardened Full Grinding Process: Increases wear resistance, sharp and durable, used for stainless steel, cast iron, titanium, aluminum and hard metal
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Twist Design And Performance: Precise 135° split point, gold oxide finish and round straight shanks. prevent walking, clear chips and particles faster, produced by precision fully ground which ensures chips move smoothly
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Use Notices: Drill bit should be vertical to the workpiece when used, controling low speed from 200 to 1000 rpm; using cutting fluid will stay cool to make the bit last longer
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Various Sizes: 21 sets of drill bits include 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4, 17/64, 9/32, 19/64, 5/16, 21/64, 11/32, 23/64 and 3/8 inch, can meet more needs
