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【SIZE SET 】:19pcs of M35 cobalt steel twist drill bits,1mm,1.5mm,2mm,2.5mm,3mm,3.5mm,4mm,4.5mm,5mm,5.5mm, 6mm,6.5mm,7 mm,7.5mm,8 mm,8.5mm,9 mm,9.5mm,10 mm.
【SMOOTHLY DRILLING】: quick-cut pilot split points are self-centering and can penetrate quickly with less pressure. The bits will not "walk" or "wander". Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks.
【HSS MATERIAL】:M35 cobalt steel,with molybdenum and cobalt added to creates a hardened alloy, measuring Rockwell hardness up to 67, extremely heat resistant; for much faster cutting and extra longer life span when compared with an average HSS drill bit.
【ORGANIZED HOLDER】: Each bit has an assigned hole in a drill bit holder with size indexing for easy storage and quick organization.
【WIDELY USE】:M35 Cobalt HSS is more suitable for hardened material. Particularly successful in cutting through hard metals such as stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods, and also can be used for softer materials.

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Cobalt Steel Twist Drill Bits Set A nice-to-have bit set for repeated drilling in metals M35 Grade Cobalt Steel drill bit set.
Cobalt drill bits are not made of pure cobalt, but rather a steel alloy with certain percent cobalt. The 5-percent alloy is known as M35 grade. The cobalt increases the strength of the steel and makes it more heat-resistant.
are more expensive than ordinary HSS drill bits. But if you regularly drill metals,since they tend to last longer.
Stunning drill bit set/metal drill bits for steel/Lightweight drill bit for metal/wood/plastic and can be used for home DIY projects, industrial manufacturing, construction etc.
Specifications:
Set Quantity: 19 pcs
Size:1mm/0.03",1.5mm/0.05",2mm/0.078",2.5mm/0.098",3mm/0.11",3.5mm/0.13",4mm/0.15",4.5mm/0.17",5mm/0.19",5.5mm/0.21", 6mm/0.23",6.5mm/0.25",7 mm/0.27",7.5mm/0.29",8 mm/0.31",8.5mm/0.33",9 mm/0.35",9.5mm/0.37",10 mm/0.39".
Notice:
If you have any problems with our cobalt step drill bit set, please contact us in time; we will reply you within 24+! I wish you a pleasant shopping experience.

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