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🐌 spiral grooved industrial preamer cobalt logo

🐌 Spiral Grooved Industrial Preamer Cobalt Review

3

Β·

Excellent

Revainrating 5 out of 5Β Β 
RatingΒ 
5.0
πŸͺš Industrial Drill Bits, πŸ”ͺ Cutting Tools

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Description of 🐌 Spiral Grooved Industrial Preamer Cobalt

Suit for use in hardness under 28 artifacts,(Such as: Stainless steel , iron plate, aluminum, wood ). You can use water to cooling it when it is work and it can be used for even longer. Solid M35 molybdenum high speed construction with cobalt added for extra durability, close to impossible to snap compared conventional drill bits, the unique 3-sided shank prevents slip in drill chuck and reduces shocks; oiling the bits recommended before every use to maximize the service life. No need of center punch.Compared with the ordinary twist drill,it is not easy to break and it can be used for deburring, chamfering and open hole on Wood metal plastic。. Material: M35(HSS-Co).Size :4-32mm,6-24mm,4-22mm,3-12mm,4-12mm.

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

This is amazing quality

This is amazing quality. I repaired a 3/4" thick steel plate (time to irradiate) in less than a minute. I didn't even have time to use line fluid.

Pros
  • Industrial drill
Cons
  • Ugly packaging

Revainrating 5 out of 5

M35 cobalt step bits for under $10 each. Do I have to say more?

I searched a long time to find it. I've found many cobalt coated step bits (the purpose of which I don't understand other than to mimic cobalt alloy bits) at reasonable prices, but I've had a hard time finding a solid cobalt alloy M35 set at a good price. Until I finally found this one. Amazing value.

Pros
  • Drill for metal and universal drill
Cons
  • I don't remember, but there was something

Revainrating 5 out of 5

Works as expected, good for metalworking and general purpose drill

I had some nuts on my car and needed to drill them out. It was a nightmare, but these pieces stayed there and went through the few I had to remove without wearing out or breaking. After making a decent sized pilot hole with the smaller one and just chewing through the larger one and getting through it quickly, I was quite impressed.

Pros
  • Step drill
Cons
  • Questionable purchase for the elderly