They are made of high-speed steel 4241. There are several commonly-used HSS types: 4241, 4341, M2, M35, M42. HSS 4241 is of the lowest price and relatively lower quality compared to others. The material decides that they can be used mainly in drilling wood, plastic and soft metal sheet like aluminum. If your purpose is to drilling metal, please buy M35 grade drill bits. Shank: Round Material: High-speed steel 4241 Surface Treatment: Plating titanium Package include: 13 * Twist Drill Bit
V**N
Worst drill bits ever
Purchased these metric drill bits to drill in aluminum . The shanks wobble and the cutter tips dull fast after a few cuts in aluminum 1/4" plate. I have never seen bits this poor in quality. I used cutting oil from the first time I used them and they still dulled fast.
J**N
Poor quality
I bought these because it was the cheapest way I could get a12mm drill. You get what you pay for with this item, I wouldn't recommend buying these if you plan on using them daily, I've got one how to drill and I'm thinking of resharpening the drill before I do it!
D**D
The sizes
very good
A**E
Titanium NOT
Apparently Titanium is not harder than sheet metal as a couple times of using bits they either was so dull they did not cut or they snapped into two pieces.
R**H
So far holdinv up good stays sharp
Well worth the price. Very nice for not being a high dollar set
Trustpilot
1 month ago
2 weeks ago
