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Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 29Pcs M35 High Speed Steel Twist Jobber Drill Bits 1/16"-1/2", with Metal Index Storage Box
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*Packaging of actual item may differ from photo shown
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Sinyeenglon Cobalt Drill Bit Set for Hardened Metal Features
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Cobalt M35 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: 29 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“, 3/8", 25/64", 13/32", 27/64", 7/16, 29/64, 15/32", 31/64", 1/2", can meet more needs
