DrillGlass 10 Pack of 1/20" Diamond Drill Bits | Fits Your Rotary Tool, Drill or Drill Press ! Compatible with Dremel | Drill Bits for Glass and Jewelry | Beginner'sInstructions Included (12018RB)

I bought this product besause of a friend Promoting It on Youtube. Lapidary Dave, If you have seen His channel You would see he a great guy and wouldn't steer you wrong.

I use these for drilling holes in sea glass, crystals, and some stones. They are great, functional, although (depending on the stone) they will break on subsequent use. Because of the price, it doesn't bother me...I just order more. Good product!

I was able to drill through 5 rocks, 1 shell, and 2 metal bottle caps with the same drill bit, and that one still has some grit to it. I haven't had any issues. The bits fit directly into my Dremel without any additional accessories. There is a bit of quality control lacking. One of the drill bits was oddly tapered so that it was thicker on the end. This one was unusable, but extra. The product description said 10 drill bits, and the pack came with 11, so I got 10 usable bits. I will continue to use these for drilling stones. They also work for resin. Just be sure to follow the tips and instructions.

I used 3 bits with my dremel on turqouse and variscite stones I cut, ran at lower speeds and they hardley cut the rocks before breaking . on the quarts matrix of a variscite stone the bit wouldn't even cut into the stone.

They are working wonderful for drilling my little bits of sea glass!!

Keep looking. Blew threw 2 bits trying to drill a piece of glass and it happened so quick I didn’t even bother trying a third.

I have drilled stained glass, I know what I am doing. I spent more time changing my bit then drilling holes. I got 70 holes drilled in the stained glass pieces. $24 is expensive when you are making something out of scrap glass. Unfortunately I didn't try the bits when I received them and it's too late for a refund.

Very easy to use and durable.