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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.
No center punch is needed-the 135 Quick-Cut points are self-centering and penetrate quickly with less pressure. Will not "walk" or "wander"
Extremely heat resistant; must be used and operated at 1500 RPM or greater for maximum efficiency. Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks
The set includes 50pcs of M35 cobalt steel twist drill bits: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 10pcs of each size
Particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, too.

Description

Different types of drill bits are used to cut holes in different types of materials.
This set of Migiwata M35 cobalt steel drill bits are particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, too.

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;
this is an important factor in drilling hard materials because the friction of metal against metal can produce high temperatures that damage the material or the drill bit.

Tests shows that the M35 cobalt steel drill bits can penetrate a 5mm-thick 304 stainless steel plate in 5 seconds.
Cobalt drill bits are more expensive than other drill bits, but if you regularly drill through metal, they are a good investment since they tend to last longer.

Notice: The working life of the drill bits can be largely prolonged by using with cooling liquid.

Specifications:
Material: M35 Cobalt Steel
Angle Point: 135 Degree
Flute Type: Spiral
Hardness: Rockwell 67
Shank Type: Straight Shank

You will get:
1mm (3/64") Cobalt Drill Bit x 1pc
1.5 mm (1/16") Cobalt Drill Bit x 1pc
2 mm (5/64") Cobalt Drill Bit x 1pc
2.5 mm (3/32") Cobalt Drill Bit x 1pc
3 mm (7/64") Cobalt Drill Bit x 1pc

Warranty : Within 90 days product quality is not completely satisfied, please CONTACT US, 100% refund.