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💪 Highly Durable Wrightus Straight Stainless Steel Review

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Poor

Revainrating 2.5 out of 5  
Rating 
2.3
🪚 Industrial Drill Bits, 🔪 Cutting Tools

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Description of 💪 Highly Durable Wrightus Straight Stainless Steel

✅ Faster Cutting and Longer Life— Our Twist Drill Bit HSS are Manufactured from M35 cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, measuring Rockwell hardness up to 67, for much faster cutting and extra longer life span, with up to 12 times when compared with an average HSS drill bit. ✅ No Center Punch Is Needed—The 135° Quick-Cut points are self-centering and penetrate quickly with less pressure. Twist drill bit kit Will not "walk" or "wander". ✅ Extremely Heat Resistant — twist drill bits Must be used and operated at 1500 RPM or greater for maximum efficiency. Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks. ✅ Metal Cutting — Drilling Steel, Stainless Steel, Hard Metal and Iron.Particularly successful in cutting through hard metals such as hard metal ,stainless steel and cast iron, although they can be used for softer materials, too. ✅ Easy Usage And Store —The set includes 13pcs of M35 cobalt steel twist drill bits: 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 4.8mm, 5mm, 5.5mm, 6mm, 6.5mm,13Pcs Packed in a Plastic Bag For Easy Usage And Store.

Reviews

Global ratings 3
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Type of review

Revainrating 1 out of 5

Works great, tip makes a hole when twisted

I needed metric bits, they were the best price on Amazon at the time, regardless of the material composition. I don't usually buy cobalt bits because I can't sharpen them, but they're mainly used in 3D printing, brass, and aluminum, so I'm not worried about them (hopefully) becoming dull. I'm very glad I finally got a full set of metrics.

Pros
  • ✅ Extremely Heat Resistant - Twist Drill Must be used and powered at 1500 RPM or higher for maximum efficiency. Cylindrical shank ensures a secure hold and precise centering, fits standard drill chucks and normal round collets
Cons
  • Not bad, but...

Revainrating 5 out of 5

Only for very light work.

I bought them because I needed them to fix four holes with a diameter of 2.5 mm in two aluminum blocks. The holes were only an inch deep and the aluminum was pretty soft, so I didn't think I was putting too much stress on the bits. To be extra careful I used a sturdy drill press, some lube and went back a few times to clean up the shavings. When drilling the 4th hole, the drill broke off inside the hole. Now I need to replace the block and get a new drill bit. Not worth the money.

Pros
  • ✅ Easy to use and store - Set includes 13 M35 cobalt steel twist drill bits: 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 4 .8mm, 5mm, 5.5mm, 6mm, 6.5mm, 13 pack packed in a plastic bag for easy handling and storage
Cons
  • I'll write later

Revainrating 1 out of 5

Works with Hardened Bolts

I needed to drill a broken 12mm hardened bolt in a tight space on my Honda Odyssey and bought these in the hopes they would really run out were cobalt steel and would not wander excessively without center punch. It was just what I needed; I was able to center and hold the drill in the center of the bolt despite the awkward position while the drill penetrated the hardened M10.x bolt I was so concerned about. That use alone made this purchase worthwhile and I now have a whole set to use when I…

Pros
  • ✅ No center punch required - Quick-Cut 135° tips self-center and penetrate quickly with less pressure. Twist Drill Bit Set Won't "walk" or "wander"
Cons
  • Large and bulky