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Hymnorq 4mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit Set of 10pcs with Straight Shank to Cut Through Hard Metals Like Stainless Steel and Cast Iron - B07BBM4L69
Hymnorq B07BBM4L69
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UPC
666389177544
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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. 135°SPLIT POINT - the 135°quick-cut split point are self-centering and able to penetrate metals quickly with less pressure, prevent bits from "walking and wanding". Easy cutting without need of center punch. 10PC METRIC BITS - The set includes 10pcs of 4mm 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. 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.
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