I was looking for a drill bit that could be attached to a Dremel to drill sea glass. I searched the internet for days, reading previous customer reviews on each product and finally settled on this set. Although there were no positive reviews, I took a chance. I have read all the comments of those who have been successful and listened to their advice. Start with an incline, then move vertically and don't push too hard. Some have even said that the pressure you put on the sea glass makes it pulsate. Also put a piece of glass on a sponge and dip it in water, making sure to keep it wet while drilling. I followed all these tips and pierced about 5 pieces of sea glass in just a few minutes. One thing to add to the tip: make sure your Dremel tool is on HIGH. At first I tried drilling through a piece of glass and didn't realize I hadn't rotated it all the way. IT MAKES A BIG DIFFERENCE! I haven't used it a ton but I'm happy with it out of the gate. I think this will definitely do the trick.