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🔥 Drill Like a Pro, Last Like a Legend ⚙️
This 2-piece set of 5mm M35 cobalt steel drill bits combines 5% cobalt alloy with titanium coating to achieve Rockwell hardness up to 65, enabling faster, cooler, and more precise drilling through hard metals such as stainless steel and cast iron. Featuring a 135° point angle and 2-flute design, these bits reduce wobble and efficiently clear debris, making them ideal for professional-grade metalworking tasks.
| ASIN | B08P6V4376 |
| Best Sellers Rank | #1,565 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Metalworking & Multipurpose Drill Sets |
| Brand | LingGan |
| Brand Name | LingGan |
| Customer Reviews | 4.4 out of 5 stars 1,397 Reviews |
| Cutting Angle String | 135 degrees |
| Cutting Diameter | 5 millimeters |
| Finish Type | Titanium |
| Finish Types | Titanium |
| Item Dimensions | 3.39 x 0.2 x 0.2 inches |
| Item Weight | 0.02 kg |
| Manufacturer | LingGan |
| Material | M35 Cobalt High Speed Steel |
| Material Type | M35 Cobalt High Speed Steel |
| Minimum Bore Diameter | 5 millimeters |
| Model | 20-20-11-27-12-55 |
| Number of Flutes | 2 |
| Number of Packs | 2 |
| Number of Pieces | 2 |
| Part Number | 20-20-11-27-12-55 |
| Point Style | Taper Point |
| Set Name | 2-Piece Set |
| Shank Type | Straight |
| Surface Recommendation | Stainless Steel,Cast Iron,Steel,Metals |
| Tool Flute Type | Spiral |
| Unit Count | 1 Count |
A**A
Great Drill Bits!
Cobalt drill bit worked great with tapping fluid. Used for boring 6061-T6 forged aluminum. Made sure to re-apply tapping fluid when feeling slight friction before continuing. Also used it for tapping 5mm threads in the same 4.2mm drilled hole as recommended for best clearance. Thought I wanted a hex shank but the round shank is better for less wobble and precise concentric drilling since i used a hand held drill. Worked like a charm!
W**T
Great bits
Great bits very sharp
R**B
Perfect for the job
Cut through steel and aluminum EZ PZ. I used it for cutting holes in my trunk to mount a spoiler on my sports car. Worked great!
S**1
Nice bits, flimsy plastic storage case.
Bought this to keep in my RC plane field tool box. I'll only be drilling plastic and balsa, I don't need the most expensive drill bits available. Disappointed to see when it arrived the clear plastic cover of the bit holder case was shattered, but that's probably an Amazon's delivery/handling issue. For the price I'll keep them.
T**R
Staying sharp
Tuff solid sturdy good price stay sharp
G**N
The Power Of Cobalt Compels You
These actually cut into my 30 year old exhaust bolts that I've been trying to drill out for weeks. Gotta keep em oiled and go slow and they will literally shred heat tempered metal. If you see smoke you are not doing it right. Slow down, you should see long coils of metal coming down from the bit, not tiny flakes or smoke, if you see those add oil and slow down. Cobalt is a brittle metal, don't push too hard, be very careful when it finally breaks through so you don't snap them off. If you push too hard, you'll snap them off. The slower you go the better, heat is not your friend! If the bit gets super hot it will get dull so keep it oiled, keep it slow, and take breaks if it feels like the bit is getting too hot.
T**R
As described
Functional and proper metric sizes. Used in plastics and metal.
A**S
Worthless. Broke the first time we used them.
Do Not Buy! These bits broke the first time we used them! A waste of money. I bought some good ones at Home Depot.
H**S
Buen producto
Buen producto. Recomendado.
D**R
Seems high quality
very sharp & feels quality bit.
H**S
Buen producto
Buen producto
B**T
nice to have
very sharp
G**G
excelente calidad
Muy recomendable
Trustpilot
2 months ago
2 weeks ago