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Shane M Scott
Reviewed in the United States on March 11, 2025
Patience, patience, patience. I drilled out over .5 inches of a broken 5/16-18 tap. I had to drill dry. Ya, I know you're supposed to keep them wet. I'm sure I went through more bits dry, but couldn't keep them wet where I was working. Very happy with the product.
gA
Reviewed in the United States on February 5, 2025
I use these diamond drill bits for sea glass and gemstones, and they work great. This set has four really useful sizes and works perfectly with my Dremel. It comes with collets, so it fits securely. Strong, accurate, excellent value-recommended to all jewelry makers!
777arc
Reviewed in the United States on February 28, 2025
Nice diamond coated bits for drilling holes into glass, although not sure why it mentions dremels because the collects that come with it are 0.165" diameter but most dremels use 1/8" bits (0.125"), and the largest bit itself is 2.5mm (~0.1"). I just use them without the collects, in a drill press. Make sure to use water when cutting glass!
LC
Reviewed in the United States on February 1, 2025
This diamond drill bit set works exactly as the description claims. We use these in a Dremel tool. (The set comes with the adapter pieces that hold the bit snug). They do take some time to drill through thick materials, but we were able to drill through glass easily by starting at an angle, then straightening out. The trick is to be patient, and do some test pieces to get the pressure right, and a feel for it. We purchased a small $10 metal vice with a plastic clamp piece on Amazon as well, which we set in a bowl of water to hold the pieces for the drilling process, and that worked excellent. The bits seem very strong and well-made. Quality product, and nice that you get so many for the price! Highly recommend for jewelry making, crafts, drilling beach stones, etc. just don’t forget you have to drill under water!
Wayne M.
Reviewed in the United States on January 29, 2025
These drill bits do very well in hard material (oyster shells), but the diamond coating does wear off making them then like any other bit.
User
Reviewed in the United States on January 24, 2025
While the drills drill, they can only do so with excessive pressure or a pilot hole since the tips seem to be cut inexplicably flat for a drill. Which kind of defeats the purpose of it actually being a drill, in my opinion.It's almost like the designer saw an image of a drill in a magazine once, thought 'hey, let's make some of those!' And then designed them without knowing what they'd be used for. Additionally, the diamond coating is rough grit.. really rough grit. So if you wanted to use them to drill thru.. say, glass, stone, or other brittle surface, expect heavy chipping of your material.
Angelia Mayo
Reviewed in the United States on July 6, 2024
The price was great and the added collet was really nice. Shipping was super fast and arrived undamaged.
Sam
Reviewed in the United Kingdom on July 31, 2024
Bought for my gf as she needed more diamond drill bits, the drill bits work great, but the Callet it came with broke after a day and no longer holds the drill bits. Now having to buy one through someone else.
Debbie Hungle
Reviewed in Canada on March 8, 2024
Came 5 days late.
Customer
Reviewed in Canada on November 10, 2024
produits très cheap, je ne recommande pas
Wolfy9052
Reviewed in Canada on October 3, 2023
Work well ! And I can use them multiple time
Patrícia
Reviewed in Mexico on February 18, 2022
Excelentes para perforar perlas 👌me encantaron
Molly Jackson
Reviewed in the United States on August 7, 2020
I use these to make stained glass earrings, and have purchased several times. The first time I ordered these, I’d say 90% of the bits worked wonderfully and I got a lot of use out of them. The next time I’d say about a quarter of them were unusable, the tips were not fully coated so they wouldn’t even bite into the surface of the glass to begin drilling- a little frustrating but for the price I couldn’t really complain. My most recent purchase only 4 of them were of decent quality, and even then they did not last for more than 20 holes. I’m hoping this last purchase was a fluke as far as quality, and am taking another chance and am purchasing again as these bits are exactly what I need, just wish they were more consistent.
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