Kamtop Diamond Holesaw Set 16 PCS Diamond Drill Bits Set with 6mm-50mm Diamond Drill Bits for Glass Ceramic Tile Porcelain Marble Granite

I was using the 45mm hole saw to drill holes in porcelain tile. I got two holes out before the bit was spent and no longer able to cut. For the money, not necessarily unexpected. This is a very affordable set. Just keep the expectation of getting about 2 holes from the larger pieces. The 35mm hole saw seems to last a little longer. I think I might get three holes cut out of that one before it's done. I used water to keep the saw blade cool, took breaks to keep the sawing intervals short, etc. etc. to maintain the life of the bit. That's just what you get.

Needed a decent set 2 issues I found is for a masonry cutter they don’t last long and the shanks bend easily

They was rusty n made really cheap

Muy buena calidad

Perfect