Drilax Diamond Drill Bits for Stone – 30-Piece Set (1mm, 2mm, 3mm) for Glass, Gemstones & Jewelry – 1/8-Inch Shank Compatible with Dremel Rotary Tools – Jewelry Making Supplies & Lapidary Kit

I’m very happy with this DRILAX diamond drill bit set. The case arrived well-packaged, and the bits were neatly organized and clearly labeled by size (1mm, 2mm, and 3mm). The diamond coating looks even and well-applied, with no visible defects. I used these on glass and ceramic, following the instructions to start at an angle and use water, and they performed exactly as expected. The bits cut cleanly without chipping, and none of them overheated or lost their grit during use. For small, precise holes, they work extremely well. For the price, getting 30 pieces is a great value, especially if you do detailed or repetitive work like crafts, tile, jewelry, or DIY projects. The storage case is also a nice bonus for keeping everything organized. Just be sure to use water and take your time—these bits do a great job when used properly. I would definitely buy this set again and recommend it to anyone needing small diamond drill bits

Bought these for my daughter. She recently got an engraving pen. I saw these and figured I'd give them a try. They fit well and work fine. They cut with precision. I like how it comes with all different sizes, great variety. They're very well made and get the job done.

Very nicely works well

I used these Drilax Diamond Drill Bits to drill small holes in sea glass for a project, and they did a fantastic job. The bits cut cleanly and precisely without cracking or chipping the delicate glass. With a little water for cooling and a steady hand, I was able to get smooth, professional-looking results. Highly recommend for anyone working with glass, shells, or other fragile materials. Great value and performance!

These drills are great. Drill perfect holes thru my tumbled stones so I can make jewelry. They came in three sizes all perfect fit for my needs and the quality was better than expected along with the price. Have done over a dozen still using one drill as none dulled or broke. Very sharp. Will buy again

New Review: After more attempts and talking to a professional glass worker I have discovered the trick to drilling through glass with these. Set the drill to the maximum speed possible. A Dremmel tool might not be at the fastest speed setting because it is faster than a drill. Firmly anchor the glass and the drill. The glass should be on a flat wood surface. Lubricate the glass surface with water. Slowly bring the drill to the surface of the glass. Do not apply any pressure. You should be supporting most of the weight of the drill. Initially the water lubricant will turn black. For most diamond drill bits this would mean that they are broken. For this set, it does not mean they are broken. I think the diamonds are coated with a thin layer of titanium or steel that is rubbing off. Replace lubricant every few minutes. After a few replacements it will turn white with drilling instead of black. The drill will drill faster. After you are halfway through, turn the glass over and drill from the other side. It takes about 10-30 minutes to drill through 2mm of glass. This is pretty slow, but it is in my price range so that is what matters in the end. Old Review: I bought these to use to cut FTO coated float glass. The instructions for using diamond drill bits are to use a low rotation speed, and apply only 8-16 pounds of pressure. Using a drill press I was not able to drill through glass using only 16 pounds of pressure, the bit never made it past the surface. When I applied more pressure the diamonds broke off from the surface and acted as a grit to abrade the surface. This did allow the drill to bite into the glass, but it took a very long time (about 15 minutes when higher quality products only take 3) at high pressure and RPM to drill through the glass. Unfortunately this amount of pressure also caused chipping around the edges of the hole and blowout at the other end of the hole, creating an ugly break cone. Each bit could only drill one hole this way before being discarded. Some bits snapped before they drilled through the glass. This product is useless to me. It is possible that these bits could cut into softer stone or sea glass, but for float glass it does not work.

These are perfect drill bits that I will be using with my CNC router. I bought collets as well to step down the drill bit size and am very excited to use these.

I bought these to use on a geo rock. It was my first time using cutting open a rock. They worked out great. They were extremely durable and easy to work with and clean. I liked having the option for different sizes. I would definitely purchase again when needed.