TEMO 20 pieces 1MM diamond coated drill twist bit for glass marble tile or rock

These just do not work, I went thru 40 bits within an hour drilling holes in stain glass and broke a lot of them. Sure the diamonds are all on the sides of the bit but nothing at the tip where it should be for them to work, very frustrating to have to replace one every glass I tried to drill. I only gave it one star because you have to give something, but don't waste your money on buying something that does not work.

I'm drilling semi-precious and polished stones with it. Seems like the diamonds wear off too quickly. Two have broken. My expectations may have been too high. I might need to try the sintered bits as they may suit my needs.

Too Flimsy to be used, I tried the drill press and the drummel, useless, waste of money

Great!