Review on 💎 Diamond Drill Bit Set by Neiko: Superior Performance for Precision Drilling by Joel Mosqueda

The smallest cutter had a bent shank. So instead I used the next size up to drill through the porcelain stoneware. Used water for cooling. After 30 seconds of drilling I had a 3/16 deep hole and all of the "diamond dust" was missing from the main cutting edge - it basically looked like a tiny crown with no teeth. I do not recommend this product at all. Check out the picture attached to this review. it shows the unused bit on the left and the used bit on the right.