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IRWIN Drill Bit Set, M35 Cobalt Alloy Steel Steel, 29-Piece (3018002)

4.7 4.7 out of 5 stars 1,920 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Jobber Drill Bits by IRWIN
$129.78
FREE Returns
Available at a lower price from other sellers that may not offer free Prime shipping.
29pc Pro Case
Cobalt
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Purchase options and add-ons

Material Cobalt
Finish Type Cobalt Alloy Steel
Shank Type Straight
Cutting Angle String 135 Degrees
Brand IRWIN

About this item

  • 29 Piece
  • Cobalt Alloy Steel Drill Bit Set
  • Sizes 1/16 inch -1/2 inch in 1/64 inch increments, 135 Degree Split Point To Minimize Walk
  • 5% Cobalt Alloy Steel For Higher Heat & Abrasion Resistance
  • Heavy Duty Web Construction For Strength & Durability
› See more product details

Customer ratings by feature

Longevity
4.5 4.5
Value for money
4.4 4.4
Sheerness
4.4 4.4
Durability
4.4 4.4
See all reviews

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From the manufacturer

IRWIN
irwin auto tools

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IRWIN Drill Bit Set, M35 Cobalt Alloy Steel Steel, 29-Piece (3018002)

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Product Description

Product Description

Ideal for drilling in tough metal, including heavy-duty abrasive alloy metal drilling on hardened steel. Made from industrial grade High-speed steel for increased durability. 8% Cobalt Alloy Steel alloy is heat and abrasion-resistant. 135-degree split-point tip starts drilling immediately with less force and eliminates "walking" across the work surface. Metal index case for easy bit access and identification. Includes drill bit sizes 1/16- to 1/2-inch in 1/64-inch increments. IRWIN Tools Cobalt Alloy Steel High-Speed Steel Drill Bit, 29-Piece Metal Index Set (3018002).

Amazon.com

The Irwin 29-Piece Cobalt M-35 Metal Index Drill Bit Set includes drill bit sizes measuring from 1/16 to 1/2-inch in 1/64 inch increments. The 29 bits are made using heavy duty web construction for strength and durability, and the cobalt steel extends the life of cutting edges. The 135-degree split point tips start drilling on contact and cut with less force. A reduced shank above the 3/8-inch point lets you use larger drill bit in a 3/8-inch chuck, and you can select the right bit using a convenient tap and drill selection chart. The set's rubber overmolded case protects against damage from accidental dropping, and you can remove cartridges to easily carry bits from the case to your worksite.

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IRWIN Drill Bit Set, M35 Cobalt Alloy Steel Steel, 29-Piece (3018002)
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Milwaukee Electric Tools 48-89-2332 29Pc Cobalt Helix Drill Bit Set, Red
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Price$129.78$50.56$59.95$11.99$15.89$103.95
Delivery
Get it as soon as Tuesday, Apr 30
Get it as soon as Tuesday, Apr 30
—
Get it as soon as Tuesday, Apr 30
—
—
Customer Ratings
4.74.7 out of 5 stars1,920
4.74.7 out of 5 stars140
4.74.7 out of 5 stars1,920
4.44.4 out of 5 stars1,330
4.44.4 out of 5 stars3,362
4.84.8 out of 5 stars93
Value for money
4.4
—
4.4
4.1
4.0
4.9
Durability
4.4
—
4.4
3.9
3.8
4.9
Longevity
4.5
—
4.5
—
3.7
5.0
Sturdiness
4.2
—
4.2
4.1
—
—
Sold By
Amazon.com
Amazon.com
TruckloadTools
GMTOOLS US
STROTON
SuperbSuppliers
material
Cobalt
High Speed Steel
Cobalt
Cobalt Steel
Cobalt
Cobalt
shank type
Straight
Straight
Straight
Round
Straight
Straight
tool flute type
Spiral
Spiral
Spiral
Spiral
Spiral
Straight
finish type
Cobalt Alloy Steel
Gold Oxide
Cobalt Alloy Steel
Titanium
Hardened
cobalt
surface suggestion
Alloy Steel
Metal,Plastic,Steel,Wood
Alloy Steel,Metal,Metals,Steel
Plastic, Metal, Stainless Steel, Wood
Wood
Metal,Pvc,Wood
cutting angle string
135 degrees
—
135 degrees
135 degrees
135 degrees
—
point style
Split Point
—
Split Point
—
—
brad point,center point

Customer reviews

4.7 out of 5 stars
4.7 out of 5
1,920 global ratings

Customers say

Customers like the ease of use, size and appearance of the drill bits. For example, they mention that it makes drilling easier, has a good range of sizes and that the case is made beautifully. That said, they appreciate the value, performance, and sharpness. Opinions are mixed on durability.

AI-generated from the text of customer reviews

243 customers mention209 positive34 negative

Customers like the quality of the drill bits. They say they're well made, stronger, and longer-lasting than other drill bits they've owned. Some mention that the bits are lubricated and last longer.

"...products for years and have always like them for their performance, durability & value. These are no different...." Read more

"...bit went right through the hardened starter bolt with ease, bit didn't bend or walk at all...." Read more

"The drill bits themselves are very good but the storage box is junk and very poorly designed...." Read more

"...These buggers cut anything and still going strong. Not cheap but a great set." Read more

121 customers mention103 positive18 negative

Customers like the performance of the bits. For example, they say they work well with any material, and are durable. Some mention that the bits work great for drilling holes in stainless, black steel pipes, and even hardened steel.

"...& used Irwin products for years and have always like them for their performance, durability & value. These are no different...." Read more

"...So I decided to try using some left hand bits. Well, it went superbly...." Read more

"...Nice kit that worked perfect. Great not to have to load up equipment to take to the small engine repair shop...." Read more

"These work well. Some youngsters don't like them because the run them too fast in metal...." Read more

77 customers mention69 positive8 negative

Customers like the value of the tools. They say it's worth the money, the price reflects the excellent quality, and it holds up well.

"...years and have always like them for their performance, durability & value. These are no different...." Read more

"Really a great value...." Read more

"...the bigger set if you need all the sizes because these are well worth the money." Read more

"...Price seemed reasonable for what you get. Haven’t had a chance to use these quite yet, but first impressions are good...." Read more

67 customers mention60 positive7 negative

Customers like the appearance of the tools. For example, they say it's a very nice case, the bits are well made and the holder is great. That said, some complain about the way the box opens and closes.

"...These are no different.The bit case is perfect and each bit is razor sharp, straight and very well manufactured...." Read more

"...Set contains a good quantity of bit size, the drill bit case is nice and each bit appears well made...." Read more

"...4 stars – Nicely done. Better than the competition and solves the problem. (B)3 stars – Works as expected...." Read more

"I haven't had a chance to use them yet, but they look really nice." Read more

58 customers mention55 positive3 negative

Customers are satisfied with the sharpness of the drill bit. They mention that it cuts true, and that each bit is razor sharp. Some say that the drill stays sharp for a long time, and can be used to cut through factory head bolts in older engines.

"The bits are very good, very sharp. The case is terrible. Hard to open, hard to close. The top does not match the bottom...." Read more

"...The bit case is perfect and each bit is razor sharp, straight and very well manufactured...." Read more

"...These Irwin bits are SHARP, and HARD. I'm not saying these are the best bits on planet earth...." Read more

"...I'm used to cheap drill bits but these cut like butter and never needed resharpened...." Read more

38 customers mention32 positive6 negative

Customers like the ease of use of the drill bits. They say the step in the drill bit makes starting a hole in steel much easier. They also say the drills hold an edge and will drill multiple holes with no issues.

"...These are excellent bits made with M35 cobalt so they are more user friendly than M42 bits and very durable if used properly...." Read more

"...Once the hole started, it drilled nicely. I do not think they will last very long however, I can certainly see and feel the inferior quality." Read more

"...Lubricating the bit reduces friction and heat buildup, which makes drilling easier and your bits last longer. Cheers!" Read more

"...new, but the Dewalt bits do not walk as much and are much easier to control when starting. I do like the Irwin storage case better than the Dewalt...." Read more

15 customers mention11 positive4 negative

Customers like the size of the tool. They mention it has a good range of sizes, with extra bits for the smallest sizes. Some say the storage case is good and the bits are perfectly sized. Overall, customers are happy with the size and quality of the product.

"...Set contains a good quantity of bit size, the drill bit case is nice and each bit appears well made...." Read more

"...This is a very nice cobalt set with a large assortment of sizes...." Read more

"...The one other thing that I want to mention is the printed bit size on the plastic case. They used medium gray ink printed on dark blue plastic...." Read more

"...The holding of the bits is precise. The labeling is good. Small but good. The bits are super sharp and as durable as any I have had so far...." Read more

55 customers mention30 positive25 negative

Customers are mixed about the durability of the tools. Some mention that the bits are securely held, and will loosen bolts as you drill. They are good for drilling out broken bolts or screws most of the time. However, others say that the hardness of the bit will break off if it catches and binds up.

"...Makes the job 10 times easier and helps the drill bits last longer." Read more

"...The smallest drill bit constantly falls out and the whole thing is soooooo chintzy...." Read more

"...Drill index is designed great and holds bits in place. We have used drill doctor on them repeatedly. Bits do not hold up to constant use...." Read more

"...The ez out snapped. As many forum posts had warned about a broken ez out making problems much worse, "now I had real problems."..." Read more

It's so nice to have something work like it supposed to.
5 Stars
It's so nice to have something work like it supposed to.
Bought the 5 reverse bits along with Irwin E-Z outs and spring loaded center punch in the frequently bought together feature.The bits impressed me right off as I've never seen a drill bit pull ribbons of metal out of a grade 5 bolt like it was aluminum. A pilot hole and then the correct size for the e-z out. A couple taps and was able to unscrew the broken muffler bolt put of my snowblower. Took me longer to find my Kroil to soak for a couple hours than it took to get the bolt out. Nice kit that worked perfect. Great not to have to load up equipment to take to the small engine repair shop.You don't use it often, but good to know you bought a quality set-up.
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Top reviews from the United States

Jimmy C. Dowers
5.0 out of 5 stars The bits are great, the case is terrible.
Reviewed in the United States on March 25, 2024
Size: 29pc Pro CaseStyle: CobaltVerified Purchase
The bits are very good, very sharp. The case is terrible. Hard to open, hard to close. The top does not match the bottom. I would buy again only for the bits. I am looking for a good case. This one should be replaced by a good one. Someone in quality control is not doing their job.
Helpful
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Amazon Customer
5.0 out of 5 stars Good quality product
Reviewed in the United States on April 12, 2024
Size: 29pc Pro CaseStyle: CobaltVerified Purchase
this product so far never disappointed me.
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JW DICKINSON
5.0 out of 5 stars IT’S IRWIN!
Reviewed in the United States on April 2, 2022
Size: 29pc Pro CaseStyle: CobaltVerified Purchase
I’ve owned & used Irwin products for years and have always like them for their performance, durability & value. These are no different.

The bit case is perfect and each bit is razor sharp, straight and very well manufactured. Random testing on soft & hard woods, 1” aluminum, 1/4” mild steel and 3/16” stainless resulted in flawless performance. Micrometer checks of random bits were well within acceptable tolerances.
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George S.
5.0 out of 5 stars Great product
Reviewed in the United States on June 1, 2017
Size: 5pcStyle: Left HandVerified Purchase
I'm not one to normally write reviews, but this product worked so well I had to do it. I had a starter bolt snapped off in the cast iron block (Chevy) of my Sea Ray Boat. I tried heating the block and grabbing the bolt with a pick to spin it around, that went nowhere. I have previously drilled and extracted bolts with regular bits, and knew this job would be a challenge. So I decided to try using some left hand bits. Well, it went superbly. I started with the medium size bit in this set (smallest that would fit in my 1/2" drill.) I used a center punch (engine block hanging off a cherry picker, BTW, no easy 90 degree reference.) That drill bit went right through the hardened starter bolt with ease, bit didn't bend or walk at all. Using s slow drill speed, it just chewed out two continual pieces of swarf until I got to what I though was the end of the bolt. I put in the next size bit, it grabbed a hold of the bolt and screwed it right out. No problems at all, it took me longer to pull my extension cord out than it did to do what I thought was going to be a nightmare job.
32 people found this helpful
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Toby Everett
4.0 out of 5 stars Very good but...
Reviewed in the United States on September 6, 2023
Size: 29pc Pro CaseStyle: CobaltVerified Purchase
The drill bits themselves are very good but the storage box is junk and very poorly designed. Opening and closing the box is an irritating operation and the lid does not shut completely.
2 people found this helpful
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TheMan
5.0 out of 5 stars Get these
Reviewed in the United States on April 4, 2024
Size: 29pc Pro CaseStyle: CobaltVerified Purchase
Really a great value. I ran the same but size as the DeWalt HHS bit on the same bit of steel and it was through it in a fraction of the time and effort. It works.
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kelly
5.0 out of 5 stars My go to for broken bolts
Reviewed in the United States on January 26, 2024
Size: 5pcStyle: Left HandVerified Purchase
Love these bits, I have removed a lot of broken studs of all sizes with these, saving the day. A mechanics must have for sure. Don't forget to use coolant.
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Tim Sheehan
5.0 out of 5 stars Hreat
Reviewed in the United States on September 26, 2023
Size: 29pc Pro CaseStyle: CobaltVerified Purchase
I live in Vietnam and a drill bit here is lucky to stay sharp until the end of the first use, if at all. These buggers cut anything and still going strong. Not cheap but a great set.
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Top reviews from other countries

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Neil Murphy
5.0 out of 5 stars Cuts like butter!
Reviewed in Canada on June 28, 2023
Size: 29pc Pro CaseStyle: CobaltVerified Purchase
What a wonderful well made product!
I had to drill into a snapped off easy out hardened bit and it went through
with no effort.
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Jeremy T
5.0 out of 5 stars Just buy
Reviewed in Canada on March 6, 2021
Size: 15pcStyle: CobaltVerified Purchase
Just buy cobalt bits don’t waste your money on anything else these will drill everything I’ve put them on including stainless
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Jonathan R.
5.0 out of 5 stars They did the job perfectly
Reviewed in the United Kingdom on January 20, 2022
Size: 5pcStyle: Left HandVerified Purchase
Good quality sharp drill bits made in the USA. They did the job really well.
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AXL
5.0 out of 5 stars Recomiendo al 100%
Reviewed in Mexico on March 22, 2021
Size: 15pcStyle: CobaltVerified Purchase
Después de algún Par de años de usar siguen funcionando muy bien, el producto a conservado filó el material es muy bueno
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erik
5.0 out of 5 stars Truck and coach mechanic.
Reviewed in Canada on June 21, 2020
Size: 5pcStyle: Left HandVerified Purchase
These work very well for drilling out manifold bolts. The bits are a "jobber" length. From factory the cutting faces on these bits are consistent at 135°. The bits are all straight and cut straight as well.
2 people found this helpful
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