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Diamond Coated Drill Bits Set

19 reviews
100% of buyers enjoyed this product! 1092 orders
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15 sizes: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 26mm, 28mm, 30mm, 40mm, 50mm
Material: iron and diamond material

Parts List:
15pc × Drill Bits Set

[5 Different Sizes] This diamonds drill bits set contains 15 sizes of 6/8/10/12/14/16/18/20/22/25/26/28/30/40/50 mm. It can be used for glass, tile bottles, block jars, fiberglass tile ceramic, slate marble, granite Lightweight stone drilling.
[Sturdy Material] This product is made of iron and diamond material cured by special strengthening electroplating. It is plated with diamond dust coating, which is very sturdy and durable to use.
[High Efficiency] The diamonds drill bits have neat opening without damaged edge. It has small incision resistance and can enhance the drilling speed.
[Easy to Use] This product is simple to operate. Water is required for lubrication when drilling. The package includes 15 tile hole cutter set, sufficient to use.
[After-sales] If you have any questions, please get in touch with us, our service team will provide you with a professional and satisfactory service.


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of Amazmerch (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

Real customer reviews

19 reviews
100% of buyers enjoyed this product!
5 stars
4 stars
3 stars
2 stars
1 star
verifed buyer
12 May 2021

Had to use that's when drilling through my quartz slab and they worked beautifully. Make sure you use water when drilling!

verifed buyer
11 May 2021

Used to put holes in ceramics for my succulents to make regular items planters! They worked great!

verifed buyer
6 May 2021

These bits are better than those I bought at Lowe's and Harbor Freight.

verifed buyer
3 May 2021

Perfect for drilling holes in ceramic and glass. Lasts longer than expected.

verifed buyer
28 Apr 2021

i bought these for my husband because he needed to drill holes into glass... it worked. I have a happy husband...not just happy wife happy life... happy husband equals happy wife which equals happy life HAHA

verifed buyer
8 Apr 2021

Great thus far. I have used the 50mm and have bored three holes into glass already. It is still going strong.

verifed buyer
2 Apr 2021

It’s a cheap Chinese probably tool, the shafts that fit into the drill are basically all different, not that that really matters but is weird, I used multiple and one specific one to drill through about 7 bottles and it still works good. For the price of this whole set you can get maybe 1 brand name drill. For what I need it for once in a while it’s great

verifed buyer
24 Mar 2021

Was happily surprised when I saw the quality of this set. Because of the low cost I did not expect the amount of diamonds on the cutting edge. I use these for cutting glass for stained glass projects. They arrived quickly and work very well. I would buy these again. Without a doubt.

verifed buyer
13 Mar 2021

I've used a smaller and a larger one so far. Both have made several nice, clean, holes, without any reduction in performance. Take it slow, and cool the bit with water regularly, and they work very well.

verifed buyer
9 Mar 2021

Drilled a 1-3/8" hole quickly and easily. Squirted with a spray bottle - cut through ceramic tile like a boss. Does want to run away when you start - start at an angle until you get a groove established, then you'll be good to go!

verifed buyer
10 Feb 2021

Helped me add a needed hole for a filter pipe in my acrylic fish tank and a couple other projects. Excellent, clean cut

verifed buyer
9 Feb 2021

Works great and price is right.

verifed buyer
7 Feb 2021

Produced a clean polished hole when I drilled through 3/8 inch glass, Can't beat the price for the set!

verifed buyer
1 Feb 2021

Works well, does the job

verifed buyer
31 Jan 2021

These little drill bits work. Had to make the hole in my birdhouse smaller so the big birds wouldn't be able to stick their beaks in and terrorize the little birds. Worked great.

verifed buyer
23 Dec 2020

Very valuable for the money. I bought them for my tile project of my bathroom

verifed buyer
23 Dec 2020

Go slow, use lots of water, not the highest quality...but the price is INCREDIBLE! I can still get 8 to 10 cuts per bit before they wear out. If you do it dry and get it hot you will burn them up in 1 hole.

verifed buyer
20 Dec 2020

like hot knife through butter. accurate description.

verifed buyer
20 Nov 2020

I bought these to use to drill holes in bottles. So far I've drilled about 8 holes and have not had a problem. A good investment for a small price.

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