KAKILFOB 19-Piece M35 Cobalt Stepped Point Drill Bit Set Review
A 19-piece cobalt-grade drill set with stepped points and 135 degree split tips built to self-center and cut acrylic, steel, and brass.
| Pieces | 19 |
|---|---|
| Material | Cobalt-grade high speed steel |
| Point angle | 135 degrees split |
| Point style | Stepped |
| Coating | Blue Onyx oxide |
| Flutes | Twist, chip-clearing |
| Best for | self-centering starts in metal and acrylic |
Product Overview
KAKILFOB's 19-piece set targets metal and acrylic drilling with stepped point bits and a storage holder. It works for enlarging existing holes or starting new, smoother ones in acrylic, steel, brass, and other hardened metals. A 135 degree split point and twist flutes handle the cutting.
The maker highlights sharpness and control. The stepped design is described as four times sharper than a traditional bit, cutting faster with less heat. The split point self-centers so it starts with less pressure, and a blue Onyx oxide coating helps stop chip build-up.
Score Breakdown
This verdict is based on the manufacturer's stated specifications, the current Amazon listing and its product images, the confirmed materials and design, real buyer ratings, and our research into the product category. Scores are consistent editorial judgments, not laboratory measurements, and we did not receive a paid sample.
Key Features
Sharper profile aimed at faster cutting and less heat.
Self-centers and penetrates with less pressure.
Blue Onyx finish helps prevent chip build-up.
Lift metal shavings up and out of the hole.
19 sizes stored and sorted between jobs.
Design and Build Quality
The bits are precision ground from heat-treated high speed steel and finished with a blue Onyx oxide coating, which the maker says prevents chip build-up. The listing markets the set as cobalt grade with an M35 reference in its title, alongside M2 HSS in the description.
A stepped point is the signature feature. This profile is described as four times sharper than a traditional bit, aimed at faster cutting, reduced heat, and longer life. The twist flutes lift metal shavings up and out of the hole.
The 135 degree split point self-centers and penetrates with less pressure. All 19 pieces store in a holder case, so sizes stay sorted between jobs.
Performance in Everyday Use
Control on start is the appeal. The 135 degree split point centers itself, so the bit does not skate on smooth metal or acrylic. That makes accurate placement easier and reduces the need to punch a pilot mark first.
Cutting is aimed at speed and cool running. The stepped, fully ground edge is described as sharp and durable, and the flutes clear shavings so heat does not build in the hole. Enlarging existing holes is a stated use as well as fresh drilling.
Metal drilling still needs care. The maker advises oil lubrication to cut friction and heat, which extends bit life. The listing mixes M35 and M2 material references, so treat the grade as maker-stated. Sharpness figures are claims, not tested.
How It Performs: The Evidence
| Decision factor | What we found | Evidence and measurement | Score | Why it matters |
|---|---|---|---|---|
| Stepped point | Sharper profile aimed at fas | Maker stated | 8.2 | Sharper profile aimed at |
| 135 degree split point | Self-centers and penetrates | Maker stated | 8.2 | Self-centers and penetra |
| Oxide coating | Blue Onyx finish helps preve | Maker stated | 8.2 | Blue Onyx finish helps p |
| Twist flutes | Lift metal shavings up and o | Maker stated | 8.2 | Lift metal shavings up a |
| Holder case | 19 sizes stored and sorted b | Maker stated | 8.2 | 19 sizes stored and sort |
Who Should Buy It
- Metal fabrication
- Acrylic projects
- Enlarging holes
- General DIY
- Workshop use
- masonry or tile drilling
- Listing mixes M35 and M2 grade references
- Four-times-sharper claim is not tested
- Metal drilling needs oil for best life
- Not intended for masonry or tile
Full Specifications
How It Compares
| Feature | Generic | Typical budget | Premium option |
|---|---|---|---|
| Pieces | 19 | Basic | Better |
| Material | Cobalt-grade high | Basic | Better |
| Point angle | 135 degrees split | Basic | Better |
| Point style | Stepped | Basic | Better |
Alternatives Worth a Look
KAKILFOB's 19-piece set is aimed at people who drill metal and acrylic and want easy, accurate starts. The 135 degree split point self-centers so bits bite where you mark, and the stepped, oxide-coated edges are built to cut fast while flutes clear shavings. A holder case keeps the range sorted. Follow the maker's advice and use oil when drilling steel to manage heat and prolong life. One caveat is transparency: the listing references both M35 and M2 steel, so treat the exact grade as maker-stated, and the four-times-sharper claim is marketing rather than a tested figure. For general metal and acrylic work, it is a versatile, well-organized set that starts cleanly.
Frequently Asked Questions
What materials can these drill bits cut?
Per the listing, the set drills acrylic, steel, brass, and other hardened metals. It can bore new holes or enlarge existing ones. The stepped, self-centering point suits smooth surfaces where standard bits tend to wander. It is not intended for masonry, tile, or stone.
What does the 135 degree split point do?
A 135 degree split point self-centers and penetrates with less pressure, according to the maker. That means the bit starts on your mark without skating, so you often skip punching a pilot dent first. It also reduces the force needed to begin a hole in hard metal.
Are these bits cobalt or M2 steel?
The listing describes the set as cobalt with an M35 reference in the title, while the body mentions heat-treated M2 high speed steel. That is an inconsistency in the maker's own listing. We report it as stated rather than resolving it, so treat the exact grade as maker-stated.
Do I need lubrication when drilling metal?
The maker recommends oil lubrication when drilling metal to reduce friction and prevent heat build-up, which extends bit life and keeps cutting smooth. Heat is the main killer of drill bits in steel, so a few drops of cutting oil and steady, moderate speed make a real difference.
Can these bits enlarge an existing hole?
Yes. The listing states the set works as an enlarger for existing holes as well as for creating new, smoother ones. The self-centering split point helps the bit locate cleanly in an existing hole, and the twist flutes clear the added shavings as the diameter grows.
This review is based on the maker's stated features and the product listing. Material grade, the stepped point design, the sharpness claim, and the coating are reported as described, not independently lab-tested here. The listing itself mixes M35 and M2 references. Any score is an editorial view of the stated design, not a measured result.