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⚡ Drill Like a Pro, Last Like a Legend
The amoolo 1/4" Cobalt Drill Bit 10-piece set features M35 high-speed steel with 5% cobalt for exceptional hardness and wear resistance. Its 135° split point and fully ground spiral flutes deliver precise, fast, and cool drilling across metals like stainless steel, cast iron, and aluminum, plus softer materials. Trusted by thousands with a 4.5-star rating and backed by a 90-day warranty, this set is a must-have for professionals demanding durability and performance.
| ASIN | B07XMM4CPY |
| Best Sellers Rank | #4,690 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #13 in Jobber Drill Bits |
| Brand | amoolo |
| Brand Name | amoolo |
| Customer Reviews | 4.5 out of 5 stars 4,239 Reviews |
| Cutting Angle String | 135 degrees |
| Cutting Diameter | 0.25 inches |
| Finish Type | Uncoated |
| Finish Types | Uncoated |
| Item Weight | 1.6 ounces |
| Manufacturer | amoolo |
| Material | Cobalt Steel |
| Material Type | Cobalt Steel |
| Minimum Bore Diameter | 0.25 inches |
| Model | AT190214 |
| Number of Flutes | 2 |
| Number of Pieces | 10 |
| Part Number | AT190214 |
| Point Style | Split Point |
| Set Name | amoolo 1/4" Cobalt Drill Bit Set |
| Shank Type | Round |
| Surface Recommendation | Cast Iron,Metal,Plastic,Stainless Steel,Steel |
| Tool Flute Type | Spiral |
| UPC | 778716244598 |
| Unit Count | 10 Count |
K**I
Long lasting bits
Very impressive drill bits. 1 bit drilled 16 holes in very hard metal. These bits out performed M42 bits I had.
C**S
Best drill bits I have ever purchased
Awesome product, very strong material, cut right through 1/4 stainless steel with no issues smoothness of the cut was perfect. Will def continue to purchase my bits from here.
H**N
"NOT for use on..." on the cover
Work fine for me so far. I was dismayed to see on the cover a list of metals on which I should NOT use these drills, some of which look like very popular metals I may need to drill. Moreso since I lack the expertise needed to distinguish the "bad" types of steel from any other types of steel. Though, for the price, paying for any mistakes I may make will not be tragic
A**G
Very nice product
Sharp, excellent drill bits. Such a pleasure to use!
J**C
Good product
Should work great
G**Y
Durable and Sharp, But Could Last Longer
The Amoolo 1/4" Cobalt Drill Bits are sharp and cut through metal, wood, and plastic with ease. They don’t overheat quickly, and the precision is great. The value for a 10-pack is solid. However, I noticed they wear out faster than expected when drilling through harder metals. For light to medium-duty work, they’re excellent, but for heavy use, they might not last as long. Overall, a good buy for the price!
M**D
Good quality. I do recommend this product.
Very good. High quality drill bids. I would buy them again when need it. Easy completed small project by drilling 15-20 holes in 1/8'' thick material, using only one bid. It's steel as sharp as when I have started to drill.
E**S
The product
Received exactly what and when I was advertised
A**A
Doesn't work as claimed
This doesn't work as expected. Too high price
I**O
Excelente calidad-precio
Excelente brocas para metal duro y diferentes tamaños para el uso de trabajo.
C**S
Decent. No complaints.
I love sharp good quality drill bits. So far these have served me well.
P**0
Drill bits
Good quality drill bits
D**E
Blunt quickly on mild steel
I needed these to drill through mild steel (T-bar fence posts). I think I managed about 5 holes per drill bit before each was too blunted to cut. I needed to research the technique: low RPM, lots of pressure and lubrication. Fortunately I needed to drill only about 20 holes in total, so I have used 5 out of the 10 bits so far. I am told that this is probably about what can be expected from cheap bits so I am pretty happy with the purchase.
Trustpilot
1 week ago
1 month ago