Hymnorq 3/8 Inch 5-Piece M35 Cobalt Drill Bit Set for

Hymnorq 3/8 Inch 5-Piece M35 Cobalt Drill Bit Set for Stainless Steel, Fully Ground Dual Twist Flute, Bronze Hue Finish,135 Degree Split Point, with Tough PP Transparent Storage Case
- High-Performance M35 Cobalt Steel: Each 3/8" drill bit is made from M35 grade steel with 5% cobalt, offering exceptional heat resistance and durability for drilling through hardened materials like stainless steel, cast iron, and alloy steels.
- Precision Dual Twist Flute Design: The dual twist flute construction ensures efficient chip removal and smooth cutting action, reducing friction and heat buildup during use—ideal for clean, fast drilling in metal and other tough materials.
- Accurate 135° Split Point Tip: Designed with a 135° split point tip, these bits start quickly and stay on target without wandering, delivering precise and clean holes even on curved or hard surfaces.
- Straight Shank with Chamfered End: The straight shank offers a stable and secure fit in standard drill chucks, while the chamfered end makes bit changes quicker and easier for a seamless drilling experience.
- Durable Transparent Storage Case: Comes in a tough, clear PP plastic case that keeps all 5 drill bits protected, organized, and easy to access—perfect for both professional toolboxes and DIY home workshops.
M35 Grade Cobalt Steel

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.

135 Degree Split Point

The flater the drill, the smaller the chip width. This means less force required to remove metal, compared with lower angles like 90Â° and 118Â°. This is important on hard stuff, because your power requirements are already more than mild steel, so making the chip load less helps. It also reduces heat since less surface area is generating the cut.

Lowest Cost Per Hole Drilled

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. With an extended tool life, Hymnorq cobalt drill bits will give you the lowest cost per hole drilled.

For Drilling Stainless Steel

This set of 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.

Tests shows that the M35 cobalt steel drill bits can penetrate a 5mm-thick 304 stainless steel plate in 5 seconds.

Not Suggested for Hardened Steel

M35 grade cobalt drill bits are NOT suitable for hardened steel, high carbon steel and heat-treated steel by the experiences of some customers, although some others said they worked well with hardened steel.

Cooling Liquid Required

Please use with cooling liquid to prolong the working life of the drill bits and to avoid overheating and breakage.

BUY WITH CONFIDENCE:

If you're not completely satisfied with the product quality, please contact us. Refund or free replacement.
Country USA
Brand HYMNORQ
Manufacturer Hymnorq
Binding Misc.
ItemPartNumber SUVELAM
Model SUVELAM
Color Bronze
Size 3/8 Inch
UnitCount 5
UPCs 681413691452
EANs 0680613728272
ReleaseDate 0000-00-00

Country	USA
Brand	HYMNORQ
Manufacturer	Hymnorq
Binding	Misc.
ItemPartNumber	SUVELAM
Model	SUVELAM
Color	Bronze
Size	3/8 Inch
UnitCount	5
UPCs	681413691452
EANs	0680613728272
ReleaseDate	0000-00-00

Hymnorq 3/8 Inch 5-Piece M35 Cobalt Drill Bit Set for Stainless Steel, Fully Ground Dual Twist Flute, Bronze Hue Finish,135 Degree Split Point, with Tough PP Transparent Storage Case

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