5 out of 5
Customer Reviews
By
Bill Kirk
Date: November 17, 2021
Works as advertised
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By
A Reviewer
Date: October 27, 2021
I bought this to drill a hole through a stainless steel teaspoon (it was a craft project), it broke within seconds.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
M. Davis
Date: July 16, 2021
Trying to drill a hole in quite soft steel, with oil bath, it's not that it got dull, rather the cutting edges bent inward so that they didn't bite. What are these, pot metal? Plastic?
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Jeffrey Anderson
Date: June 10, 2021
I used the drill bit to drill out spot/tack welds on a car-seat frame. I managed to drill out 2 and attempted a 3rd, but gave up. I dipped the bit in cutting oil and removed metal shavings. Although the bit was not hot to the touch, it was dull.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
king
Date: June 06, 2021
Ha ha I'm so punny (sorry). Seriously though I'm so impressed with Cobalt over standard titanium coated steel. Noticeably better quality all around.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Kerwin Davenport
Date: May 10, 2021
Great drill bit , very durable.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Birch Estate Liquidations
Date: April 24, 2021
Good bits, and very inexpensive. I got them to use as starter bits when drilling into steel. They hold up for about a dozen 1/4 deep holes through steel and then start to lose their sharpness. With the cheep price, I can then toss them or use them for general wood use. Will def be buying more!
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Segnetk
Date: March 21, 2021
These bits work well on steel at 3/8 '' thick or less, but they work well, they are consistent.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Justin B.
Date: March 18, 2021
Good value and great when you can't find it anywhere, I use these to drill stainless and other metal
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Barbara Boughton
Date: March 17, 2021
These are difficult for me to find locally. I needed to drill out a grade 9.9 bolt that had broken off.With patience, cutting oil and cobalt drill bits, I now have it tapped and the intake re-installed.Why would Honda use 9.9 bolts into an Aluminium head?
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Zach G
Date: December 04, 2020
Needed to drill out some steel rivets, and the other bits in my arsenal weren't cutting it. Ordered this and the 1/4 size and they worked like a charm.Didn't use any lubricant because I'm cheap/lazy and really went hard on those rivets - no breakage, weeble-wobble, vengeful spirits, or the like from these bits. They seem excellent, and I'll absolutely be buying again from Bosch if I need more sizes.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
A Customer
Date: November 16, 2020
Best bits I bought so far use them for drilling threw spring steel. Sometimes the metal can be a bit tough. Everything else fails pair to these.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Wayne Bradshaw
Date: October 27, 2020
Good deal for the money. Arrived when promised
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Edward G Clardy
Date: October 20, 2020
Drilled clean holes in wood. Was exactly as described.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Jim M.
Date: October 16, 2020
very good buy
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Jim M.
Date: October 16, 2020
very good buy
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Jim M.
Date: October 16, 2020
very good buy
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
T.a.T
Date: October 13, 2020
My husband likes them
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Calvin T.
Date: October 09, 2020
Bosch makes good drill bit
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
D. Flowers
Date: October 01, 2020
These are the most durable bits that I have found. They last much longer than any other bit that I have used on steel. I have tried many, and kept wearing through drill bits, while building a shop from steel, until I researched and found that cobalt should last.Cobalt nbits were not available locally, so I bought them here and from Menard. They are higher, but had some larger sizes.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]