Hymnorq 7mm 5-Piece M35 Cobalt Steel Drill Bit Set for Metals, Dual Twist Flute, 135° Split Point, Chamfered Shank End, with Tough PP Plastic Case
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Model: B07BKP69L6
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- COBALT STEEL - Manufactured from M35 cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, measuring Rockwell hardness up to 67, for much faster cutting and extra longer life span, with up to twelve times when compared with an average HSS drill bit.
- 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.
- 5PC METRIC BITS - The set includes 5pcs of 7mm M35 cobalt steel twist drill bits. Well packed in a plastic case for convinient storage. Manufactured to German DIN338 standard.
- 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.
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