We believe great tools shouldn’t cost a fortune.
Since 2017, we’ve been creating reliable, high-quality drill bits and hand tools for makers, builders, and DIYers around the world.
From wood and tile drill bits to cobalt bits, chucks, tube expanders, and tapping tools, every product is built to be tough, precise, and easy to use.
Our mission is simple: to give you the right tools to get the job done—without compromise.
Precision Tools, Built to Last
Precision Tools, Built to Last
40PC Cobalt Steel Tiny Inch Drill Bits for Steel
- Bulk fractional Inch drills in popular hobbyist sizes
- Extras in each size to prepare for potential breakage, which happens to small bits more or less
Drill Bit for Metalworking
About the Bits Size
These bits are small.
Please read the description and look at the pictures carefully to make sure this bits set is what you need.
Hymnorq M35 5% Cobalt Steel Twist Drill Bits Set
A nice-to-have metric bit set for repeated drilling in metals
- 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.
- Lowest Cost Per Hole Drilled - Cobalt bits are more expensive than ordinary HSS drill bits. But if you regularly drill metals, they are a good investment since they tend to last longer. With an extended life, you can lower cost per hole drilled.
- Tech Tip 1: You shouldn’t drill deeper than 1/2 of the drill bit’s fluting length to have the best drilling performance.
- Tech Tip 2: Don't use M35 cabalt bits on hardened steel, high carbon steel and heat treated steel.
All for Your Successful Drilling in Metal
Selected M35 Cobalt Steel Raw Material
5% cobalt added for
- Higher heat resistance
- Faster speeds
- Higher feed rates
High Level of Craftsmanship
- Advanced machines
- Experienced workers
- Precision grinding technique
- Smoother hardened surface
Strict Inspection
- Every piece of bit is inpected by precision instrument before being packed
- Quality never comprised
Make Most of Cobalt Drill Bits with These Tips
Be Vertical
- Keep the drill bit vertical with the stuff's surface to be drilled.
- Tilted bit is prone to break during drilling.
- Be sure to make both the bit and the workpiece stable.
Do It Slow
- Drilling metal requires low RPM. Please use a device of which the drilling speed can be adjusted.
- Be careful when you use an electric drill. The RPM could be set too high.
- The thicker the bit, the slower speed should be.
- If you're not sure, please start from the lowest RPM and pressure.
Stay Cool
- Friction between bit and metal will accumulate an amount of heat.
- It's necessary to use cooling liquid during drilling to keep the bit cool. Otherwise, the bit may fry(melt) or only last a short time.
- It's both ok to use lubricant oil and to pour water.
Right Drilling Device
- It's highly recommended that you use a drill press to drill thick metals. It's stable, powerful and (RPM) adjustable.
- If a drill press isn't available, electric drill or charging drill will do the job, too. However, it's more likely you'll meet problems unless you're really experienced.
 50PC SMALL BITS |  40PC SMALL BITS |  13PC SET |  15PC SET |  19PC SET | |
|---|---|---|---|---|---|
| Customer Reviews | — | — | — | — | — |
| Price | — no data | — | — | — | — |
| Measurement System | Metric | Fractional Inch | Metric | Metric | Metric |
| 5% Cobalt Steel | ? | ? | ? | ? | ? |
| Organizer | Plastic Bag | Plastic Bag | Plastic Index Case | ABS Plastic Index Case | Metal Index Case |
| Size Range | 1mm - 3mm | 3/64" - 3/32" | 1.5mm - 6.5mm | 1.5mm - 10mm | 1mm - 10mm |
| 135º Split Point | ? | ? | ? | ? | ? |
| Manufacturing Standard | German DIN338 | German DIN338 | German DIN338 | German DIN338 | German DIN338 |
| Manufacturing Technology | Fully Ground | Fully Ground | Fully Ground | Fully Ground | Fully Ground |
40PC Cobalt Steel Tiny Inch Drill Bits for Steel
- Bulk fractional Inch drills in popular hobbyist sizes
- Extras in each size to prepare for potential breakage, which happens to small bits more or less
Hymnorq M35 5% Cobalt Steel Twist Drill Bits Set
About the Bits Size
These bits are small.
Please read the description and look at the pictures carefully to make sure this bits set is what you need.
Drill Bit for Metalworking
A nice-to-have metric bit set for repeated drilling in metals
- 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.
- Lowest Cost Per Hole Drilled - Cobalt bits are more expensive than ordinary HSS drill bits. But if you regularly drill metals, they are a good investment since they tend to last longer. With an extended life, you can lower cost per hole drilled.
- Tech Tip 1: You shouldn’t drill deeper than 1/2 of the drill bit’s fluting length to have the best drilling performance.
- Tech Tip 2: Don't use M35 cabalt bits on hardened steel, high carbon steel and heat treated steel.
All for Your Successful Drilling in Metal
Selected M35 Cobalt Steel Raw Material
5% cobalt added for
- Higher heat resistance
- Faster speeds
- Higher feed rates
High Level of Craftsmanship
- Advanced machines
- Experienced workers
- Precision grinding technique
- Smoother hardened surface
Strict Inspection
- Every piece of bit is inpected by precision instrument before being packed
- Quality never comprised
Make Most of Cobalt Drill Bits with These Tips
Be Vertical
- Keep the drill bit vertical with the stuff's surface to be drilled.
- Tilted bit is prone to break during drilling.
- Be sure to make both the bit and the workpiece stable.
Do It Slow
- Drilling metal requires low RPM. Please use a device of which the drilling speed can be adjusted.
- Be careful when you use an electric drill. The RPM could be set too high.
- The thicker the bit, the slower speed should be.
- If you're not sure, please start from the lowest RPM and pressure.
Stay Cool
- Friction between bit and metal will accumulate an amount of heat.
- It's necessary to use cooling liquid during drilling to keep the bit cool. Otherwise, the bit may fry(melt) or only last a short time.
- It's both ok to use lubricant oil and to pour water.
Right Drilling Device
- It's highly recommended that you use a drill press to drill thick metals. It's stable, powerful and (RPM) adjustable.
- If a drill press isn't available, electric drill or charging drill will do the job, too. However, it's more likely you'll meet problems unless you're really experienced.
50PC SMALL BITS | 40PC SMALL BITS | 13PC SET | 15PC SET | 19PC SET | |
|---|---|---|---|---|---|
| Customer Reviews | — | — | — | — | — |
| Price | — no data | — | — | — | — |
| Measurement System | Metric | Fractional Inch | Metric | Metric | Metric |
| 5% Cobalt Steel | ? | ? | ? | ? | ? |
| Organizer | Plastic Bag | Plastic Bag | Plastic Index Case | ABS Plastic Index Case | Metal Index Case |
| Size Range | 1mm - 3mm | 3/64" - 3/32" | 1.5mm - 6.5mm | 1.5mm - 10mm | 1mm - 10mm |
| 135º Split Point | ? | ? | ? | ? | ? |
| Manufacturing Standard | German DIN338 | German DIN338 | German DIN338 | German DIN338 | German DIN338 |
| Manufacturing Technology | Fully Ground | Fully Ground | Fully Ground | Fully Ground | Fully Ground |
We believe great tools shouldn’t cost a fortune.
Since 2017, we’ve been creating reliable, high-quality drill bits and hand tools for makers, builders, and DIYers around the world.
From wood and tile drill bits to cobalt bits, chucks, tube expanders, and tapping tools, every product is built to be tough, precise, and easy to use.
Our mission is simple: to give you the right tools to get the job done—without compromise.
Precision Tools, Built to Last
Precision Tools, Built to Last
