But the holes were perfect. Dip the tip in water enough times to
They work! Make sure you buy enough. I needed to drill 15 holes in a 3/8" PORCELAIN TILE and this required 3 drill bits. But the holes were perfect. Dip the tip in water often enough to cool it down.
Pros
Specially formulated carbide tip for increased durability, no walking, and clean, accurate holes