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Cobalt Drill Jobber Length Iron 10Pcs: High Performance Drilling Tool for Various Materials Review

3

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Excellent

Revainrating 5 out of 5  
Rating 
5.0
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Description of Cobalt Drill Jobber Length Iron 10Pcs: High Performance Drilling Tool for Various Materials

✔️ COBALT DRILL BIT DIMENSION:1/4"(Diameter) x 2-3/4"( Flute Length) x 4"(Overall Length). ✔️ COBALT MATERIAL: HSS(M35) Cobalt Steel is the premium material with high hardness and red hardness to enable long drilling life and fast drilling performance. ✔️ SURFACE TREATMENT: The Gold Oxide Ember finished surface treatment strongthen the hardness of drill bit body to ensure the long drilling life and better drilling performance. ✔️ SPLIT POINT ANGLE 135 DEG.: No center punch is needed- the aggrevsive 135 deg. Split Point quick-cutting points are self- centering and penetrate quickly with less pressure. will not "walk" or"wander". ✔️ APPLICATION: Best used for drilling into light-gauge metal, high-carbon steel, aluminum and alloy steel, cast iron, stainless steel and titanium.

Reviews

Global ratings 3
  • 5
    3
  • 4
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  • 3
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  • 2
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  • 1
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Type of review

Revainrating 5 out of 5

Thumbs up!: Jobber Drill Bit

I had to drill out some 1/4" stainless steel screws and they cut through perfectly. I've used a lot of drill bits in plumbing and it's hard to find something that lasts a bit. You just can't smoke her, good moderate speed with little pressure.

Pros
  • Twist Drill Bit
Cons
  • Available in black only

Revainrating 5 out of 5

Great product at an amazing price

Haven't used them yet but they look like a quality product I think they're a very good deal. Thank you for the great service and I want to let you know that I appreciate your interest in my satisfaction! As I said, they look very good and I am sure that I will be completely satisfied.

Pros
  • Power tool parts and accessories
Cons
  • Not sure

Revainrating 5 out of 5

Each individual bit will drill about 40-45 holes in 3/16 " steel

Works well, plan to go through many of these. I have them for drilling holes in 3/16" mild steel used. Beams, learned I had to replace them about every 40 holes, usually due to cracking, but installing a new one was like a whole new experience, each time it felt like a good fresh drill bit was cutting in smoothly, and then each additional hole would gradually become more difficult. but then you have to wait until it breaks and you release a new one again 😀 good thing with ten packs! I bought a

Pros
  • Jobber bit
Cons
  • I will add later