Drilax 1mm 2mm 3mm Diamond Drill Bits for Glass, Stone, Sea Glass, Shells, Jewelry Making, Gemstones - 30pc Mix Set Compatible with Dremel Standard Shank

Very durable bits. They worked great on the petrified wood. I was drilling Hoes in.

Excellent product for drilling agate slices

It was great to get my crafts done

These drillbits are excellent for glass. I have used a number of different drillbits before others wore out very quickly and broke the glass. I was trying to drill. These seem to be holding up very well. I’m very pleased with this purchase.

I used the bits to drill into sea glass and no problems so far after drilling eight holes. Just used light pressure and hole started. I like the bits so far.

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.

Works well for fixing minor imperfections on glass castings

Originally purchased a set in 2020 and they worked AMAZING for drilling sea glass. The supply lasted me a good amount of time since I would use them occasionally. Come 2023, I purchased a new set as a back up for when my original supply was done. I started to use the second set a few months into 2024 and they were HORRIBLE! None of the drill bits would drill into the same kind of sea glass I use. I emailed the Drilaxtools company directly and expressed my situation. They offered to replace the order and I provided my mailing address (I live on a military base not too far from the states and we accept USPS). A month goes by and I still didn’t receive anything. I emailed them back asking if they had a tracking number for the shipment because I still hadn’t received anything and was told they didn’t keep any tracking information past 60 days. It was only 43 days after the initial email. After that I haven’t received an email since. At this point I am cutting my losses and purchased a different brand.