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Hymnorq 40PC M35 Cobalt Steel Twist Jobber Small Drill Bits, 4 Sizes 3/64 Inch 1/16 Inch 5/64 Inch and 3/32 Inch, 135 Degree Pilot Split Point, Extremely Heat Resistant, for Stainless Steel

KWD 5
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Special Features

  • COBALT STEEL - Manufactured from M35 cobalt steel, with molybdenum and cobalt added to create a hardened heat-resistant alloy, measuring Rockwell hardness up to 67, for much faster cutting and extra longer life span, with up to twelve times compared with an average HSS drill bit.
  • 40PC FRACTIONAL INCH BITS - The set includes 40pcs of M35 cobalt steel twist drill bits, 3/64" x 10pcs, 1/16" x 10pcs, 5/64" x 10pcs, and 3/32" x 10pcs. Manufactured to German DIN338 standard. Packed in a plastic bag.
  • FOR METALWORKING - Particularly successful in cutting through hard metals(hardness less than HRC38°) such as stainless steel and cast iron, although they can be used for softer materials like copper and aluminium, too. Not for hardened steel / high carbon steel. Try to adjust the RPM when it fails to penetrate.
  • DOWNLOADABLE USER GUIDE - We've summed up some tips of drilling metals, including a RPM chart for several common metals, based on our reviews and some articles on the internet. In most cases, our customers would get a much better result with these tips. Welcome to download.
  • LENGTH OF THE BITS: 3/64(1.73"), 1/16(1.89"), 5/64(2.01"), 3/32(2.24").

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