First off I NEVER leave reviews on products. This company is better than Snap-on and all the tool trucks on their warranty policy and I’ll tell you why.
First of all, the bits are great! They have a great cutting action and cut through hardened steel like butter. They really are quality bits. However, they ARE 8% cobalt which makes them very brittle. Any bit that’s 8% cobalt is going to snap now and again especially when using the smaller sizes on hardened steel.
The reason I say they are better than tool truck quality is that for one, they cut hardened steel like butter just like any Snap-on or Matco 8% cobalt bit will. The second reason is their warranty on the bits and their prompt customer service responses.
I’m a professional mechanic and we tend to drill out a lot of broken off license plate bolts so we use the 3mm, 3.5mm, 4mm, 4.5mm and 5mm drill bits to gradually drill pilot holes into the broken off bolts and then re-tap the hole with the standard 6x1.0 tap that most cars have their license plate bolts threaded to. I first broke a 3mm, contacted the company, and they sent me a 5 piece kit of their 3mm bits for nothing! Now I recently broke a 5mm bit yesterday, I contacted Stroton again and they got back to me within 24 hours. I mentioned that I broke the 5mm bit now and explained to them that I love the cutting action of these bits and also mentioned that I use the 3mm to 5mm bits often for broken bolt removal. Instead of just sending me one 5mm bit to replace the bit I actually broke, they’re literally sending me a 5 pack of each size from 3mm to 5mm (including the half sizes) so if I break another bit I’ll have extras on hand!
The tool trucks typically have a warranty on their bits, but they put a disclaimer in there that says they won’t replace ANY bit for free if it’s from a certain size down because they know they’ll crack easy at 8% cobalt and they don’t want to replace those smaller sized bits because they know people WILL break them. This company literally just sent me a boat load of bits to cover me just so in case I break another small one, I’ll have 4 more ready to go now in the event I snap another one! Their warranty policy is basically, “you break it, we’ll replace it”! GREATEST COMPANY AND BEST WARRANTY POLICY PERIOD!
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Product Description
STROTON Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)
Why choose STROTON cobalt drill bits?
The research shows that HSS with cobalt has a higher temperature resistance and Red hardness, a greater wear resistance(Hardness) and a higher heat treat response than HSS without cobalt .
- Red hardness, it causes the hardened steel to have an ability to maintain hardness at approximately 860-880 ℃.
- Higher Tempering resistance,it means to maintain a high hardness at high temperatures for an extended period of time.
- 68-70 HRC,it means that the drill bits has 3X cutting ability and 2X durability.
- This drill bits set is made of Premium Cobalt (80,000 dollars per ton).
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M42 Cobalt 8% Alloy
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3 Steps . Design (3X-5X Drilling Efficiency)
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Ideal for Metal and Hardwood
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The drill bit should be perpendicular to the workpiece when used.
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Controling the drill speed from 200 to 1000 RPM would make it easier for you to drill holes on stainless steel.
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Using cutting fluid will make the bit last longer.
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| Metric M42 drill btis (1-10mm/19pcs) | (1/16"-1/2") 17pcs cobalt drill bits set | (1/16"-3/8") 21pcs cobalt drill bits set | Metric 6% Cobalt Step Drill Bits(4-32mm/15 Steps) | (1/16"-1/4") 13pcs cobalt drill bits set | Metric M42 8% Cobalt Drill Bits Independent Packaging of Each Specification | |
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| Price | $36.89 | $29.89 | $33.89 | $28.49 | $16.39 | $10.89 |
| Measurement System | Metric | SAE (inch size) | SAE (inch size) | Metric | SAE (inch size) | Metric |
| Cobalt | M42 8% Cobalt | 6% Cobalt | 5% Cobalt | 6% Cobalt | 5% Cobalt | M42 8% Cobalt |
| Titanium Coated | ||||||
| Size | 1-10mm 19pcs | (1/16"-1/2") 17pcs | (1/16"-3/8") 21pcs | 4-32mm/15 Steps | 1/16"-1/4" (13pcs) | Small Package |
| Ideal for | Stainless Steel,Hard Metals,Aluminum,Plastic and Hardwood | Stainless Steel,Hard Metals,Aluminum,Plastic and Hardwood | Stainless Steel,Hard Metals,Aluminum,Plastic and Hardwood | （Sheet Metal）：Stainless steel , Iron plate, Aluminum,Ducts,Wood,PVC and Plastic | Stainless Steel,Hard Metals,Aluminum,Plastic and Hardwood | Stainless Steel,Hard Metals,Aluminum,Plastic and Hardwood |
| Brand | STROTON | STROTON | STROTON | STROTON | STROTON | STROTON |
| Type | Right Hand | Right Hand | Right Hand | Right Hand | Right Hand | Right Hand |
Videos
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Customer Review: they are very sharp and make holes quick
Rafael b
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STROTON Metric 8% Cobalt Drill Bit Set for Stainless Steel.
STROTON
Reviews with images
Broke a bit and Stroton replaced with 5 no charge…!!!
I don't normally stop to review products unless it's something I use quite a bit and have tried other brands of the same type of product. Well I've burned, dulled, busted, even horribly abused all sorts of drill bits. They all seem to be about equal pretty much across the board. Some maybe a little bit better in performance. Nothing that really stood out to brag about. Ok I picked up this inexpensive set (I was going say cheap set because the price is very reasonable for what you actually get). These fricken drill bits are absolutely worth every single cent I spent on them. So worth it that I'm out here looking for a large set that has both metric and standard in the M42 8% cobalt grade these are. If you peck drill with this set I don't doubt they will last a good long time. And the warranty is incredible. Lifetime replacement. No one can beat that. I'll have to say tho, I haven't had to contact them yet for getting any replaced if needed. Let's just hope that would be a smooth process as well. I'm hoping. But I gotta tell you, I'm pretty busy at the moment, but stopped just to write this because I'm actually out here looking for a larger set from Stroton as where these came from. They are everything the boast in advertising and then some. Goes thru steel like it's no big deal. But remember to peck drill so you don't over heat the bit. That goes for any drill bit out there. But if and when you get these and try them, you will not be disappointed. At least I'm not. But then again I am 57 years young. So I have a little bit of experience on how to actually use a drill bit properly. If you don't have much knowledge about drilling, remember one thing, peck drill. If you don't know what that means, look it up. You will get way better results and your bits will last twice as long if not more. I know one thing, I'll get more than twice the expected life out of these due to the fact that they perform incredibly well. Like they stand out better than the average norm. They got me as a loyal customer. I really like'm. You'd have to tear them out of my dead hands to gett'm from me. So don't even try. Buy your own. They're right here, where you're reading this review. Good luck, have fun and happy drilling.Now a message to the seller of these bits.... where are the large sets of these bits. I don't see any. If you have one send me. Link. If not, than you'd better get one quick before I begin testing other sellers that have larger sets.Thanks for the bit. Good sht for real...!!!
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Top reviews from other countries
Raymond Denis
They're digging into a broken stud!!! That's what I was hoping they would do
Reviewed in Canada on January 28, 2023Pattern Name: 1.5-6.5mm (13PCS)Verified Purchase
Client d'Amazon
top
Reviewed in France on April 24, 2024Pattern Name: 1-10mm (19PCS)Verified Purchase
Cliente Amazon
Muy buenas Brocas
Reviewed in Spain on April 22, 2024Pattern Name: 1.5-6.5mm (13PCS)Verified Purchase
Alexander
Punte quasi perfette
Reviewed in Italy on March 13, 2024Pattern Name: 1-10mm (19PCS)Verified Purchase
