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14-Piece Bosch Cobalt M42 Twist Drill Bit Set with Case EXPIRED

$24.70
$32.25
+ Free Shipping
+83 Deal Score
47,642 Views
Amazon has 14-Piece Bosch Cobalt M42 Twist Drill Bit Set with Case (CO14B) for $29.68 - $5 extra savings applied at checkout = $24.68. Shipping is free.

Note: Usually ships within 7 days.

Thanks to Community Members GimmeYoTots & PapaSpoof for sharing this deal.

Key Features:
  • Cobalt M42 drill bit provides upgraded M42 cobalt jobber-length bits designed for durability, high heat resistance and hardened surface for stainless steel, cast iron, titanium, light-gauge metal and aluminum
  • Enhanced M42 alloy material contains 8% cobalt alloy that delivers 10X life with standard bits
  • High-heat resistant bits withstand high-temperature applications for extended periods of time
  • Thick web-helix design provides additional stability in tough applications
  • Surface-hardened tip penetrates tough abrasive materials
  • Split points on bits 1/8 in. and larger allow for easy starts with no skating, eliminating the need for a center punch
  • 3-flat shank on bits 3/16 in. and larger deliver better bit grip
  • Includes: one 1/16 in., one 5/64 in., one 3/32 in., one 7/64 in., two 1/8 in., one 9/64 in., one 5/32 in., one 3/16 in., one 7/32 in., one 1/4 in., one 5/16 in., one 3/8 in., one 1/2 in.

Editor's Notes & Price Research

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  • About this deal:
    • Our research indicates that 14-Piece Bosch Cobalt M42 Twist Drill Bit Set with Case (CO14B) is $7.57 lower (23.5% savings) than the next best available price from a reputable merchant with prices starting from $32.25 at the time of this posting. -StrawMan86
  • About this product:
    • 4.7 out of 5 stars rating at Amazon based on over 2,500 customer reviews
  • About this store:
  • Please refer to the forum thread for additional deal ideas & discussion.
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Original Post

Written by
Edited January 27, 2022 at 08:28 AM by
This set, with DeWalt, were Project Farm's best rated drill bit multi pack [youtu.be]. He ranked it best for cutting through hardened steel - even over the DeWalt set. It was also the most expensive set he tested (it was $40 at the time he tested it in 2019). You don't see many discounts on these, but this is one of Amazon's lowest prices, ever, according to the Camel.

EDIT -- Thanks to PapaSpoof for the heads up re the $5 off $25 Amazon deal on Bosch bits (it pops up automatically in your cart during checkout - no coupon code or check box needed).
  • Cobalt M42 drill bit – provides upgraded M42 Cobalt jobber-length bits designed for durability, high heat resistance and Hardened surface for stainless steel, cast iron, titanium, light-gauge metal and aluminum
  • Enhanced M42 alloy material – contains 8% Cobalt alloy that delivers 10x life vs. Standard bits
  • High-heat resistant bits – withstand high-temperature applications for extended periods of time
  • Thick web-helix design – provides additional stability in tough applications
  • Surface-hardened tip – penetrates tough abrasive materials
ADD NOTE - Project Farm also rated this 7 pc Bosch Masonry bit set [amazon.com] one of its top 4 performing choices (see YouTube video here [youtu.be]). In the video he advises to buy which ever one is the best deal since they all performed so well. At $19.97, it's the lowest price of any of the top 4 masonry bits - and if you buy 2 sets, you can get 2 for $34.94 (about $17 a set).

https://www.amazon.com/gp/product...X0DER&th=1 Usually ships within 7 days
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Note that M42 is excellent for drilling steel because it's very hard, but that hardness is a double-edged sword, as it also makes it easy to break with any lateral movement. I have these bits and usually only use them in a drill press.
This is also part of the $5 off $25 deal Amazon has going for Bosch bits, bring the total to 24.68 pre-tax.
I bought the Bosch 1/2in by 6in cobalt bit by itself early last year and that alone cost me $11.

This is indeed a good deal on cobalt bits.

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#3
A little bit more than $2 a piece. Good deal. Thanks OP
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#4
This is also part of the $5 off $25 deal Amazon has going for Bosch bits, bring the total to 24.68 pre-tax.
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#5
Quote from PapaSpoof :
This is also part of the $5 off $25 deal Amazon has going for Bosch bits, bring the total to 24.68 pre-tax.
It's funny, I've been watching these due to how well they did in the PF video, however I didn't order this set until I saw your comment about the extra $5 off. Didn't know that, and agree, that makes this a much better deal. Btw, after the heads up on the extra $5 off, I had to order a set for myself (even though I really do not need more drill bits, these are great for automotive work and drilling through steel).

Thanks for the heads up (I will adjust the OP) - and repped!
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Last edited by GimmeYoTots January 24, 2022 at 06:54 AM.
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#6
Very nice. Goes up to 1/2 inch. Repped!
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#7
Note that M42 is excellent for drilling steel because it's very hard, but that hardness is a double-edged sword, as it also makes it easy to break with any lateral movement. I have these bits and usually only use them in a drill press.
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#8
I bought the Bosch 1/2in by 6in cobalt bit by itself early last year and that alone cost me $11.

This is indeed a good deal on cobalt bits.
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#9
🤣 Read the negative reviews. It's basically a blacklist of "Who knows the least about tools." (The guy with the video of the walking bit Lol. That's a dingusvand a half right there.) And I'm not trying to hurt feelings... I mean, everyone needs to learn. It's not like these people, using the internet, have any easily accessible way to learn how to do things.

As far as the bits...

Its not a bad deal at all. Great starter set of bits. Its probably the better option for "Big Box" brand bits out there... just don't expect miracles. After all, tool manufacturers aren't known for their accessories. And @burntorangehorn is correct. It's best to be used in a drill press.
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#10
These are good bits. But do not put to much pressure on them as cobalt bits will chip/crack more easily.

Other than that they cut well if used properly.
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#11
Had a SD alert on these for ages. In for one. Now to learn how to use hard / brittle drill bits Wink
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#12
Good deal, I've had a lot better experience with the Bosch Cobalt than the Dewalt cobalt bits.
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#13
Perfect! In 4 1!
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#14
Shows as $29.68, not $24

Oh, the -$5 must be getting applied at check-out?
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#15
Dewalt has a similar set on sale for comparison:

DEWALT Cobalt Drill Bit Set with Pilot Point, 14-Piece (DWA1240) [amazon.com]
$28.99 on Amazon

Doesn't have the 1/2 inch size and is M35 (vs M42 for the Bosch)--

1/16 - 2 of these
5/64
3/32
7/64
1/8 - 2 of these
9/64
5/32
3/16
7/32
1/4
5/16
3/8

So slightly different drill bit mix (but maybe better if you need the smaller sizes), but the M42 is a higher cobalt percentage and Bosch includes the 1/2 inch - and it's a better price. So thumbs up on this Bosch deal!
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