High quality carbide tip provides maximum durability. Unique design prevents cracking of material. For use with cordless or corded drills. Specially designed for drilling a variety of glass & tile materials.
I had to drill drainage holes in some ceramic pots so I could use them as pots. I had my doubts that you could actually drill holes like this, but it worked and now I'm enjoying my green.
I use these for drilling in molten glass so they dull quickly but they are the best I've found so far. I can do about 10-15 holes before having to change tips which is a pretty good average. The rest of the bits I was lucky to get 3-5.
After looking through some cheap tile bits (box of 10 for $8.99) and completing 8 of the 16 holes on porcelain tile, I bought this one here for the same price . ! To see if I'm lucky enough to finish the job! Used water etc. Broken in the middle of the second hole, even worse, the tip fell into the hole. This is how it worked and continued until one of the drill bits in the set of 10 cost 10 times as much!