Paor 15 pcs Diamond Hole Saw Set Glass Tile Porcelain Ceramic Marble Dill Bit from 6-50mm Diameter

These do cut well, I was using in porcelain and for wet cutting, but I specifically chose these as they do not have the vertical lozenge shape cuts in the sides, that if you are using with a cutting guide allow the cutter to "bump" into the dips sometime chipping the hole edge in the tile.The cutters that arrived are not as pictured, they had exactly the vertical lozenge shape cut-outs on the sides that I wanted to avoid. They actually look like the picture I've taken (only they are all new - I've used a couple!)They also have tiny black markings for the diameters, not the big clear red labelling shown.

Cutting through 10mm porcelain tiles I initially tried a dry cut. Although I did get through it did take some time and effort. The second attempt I poured could water on the tile before cutting and the drill went through much easier.As already commented on, the drill bits don't have any measurements on so be prepared for some guessing.

So far so good. Used several sizes at time of writing. They cut through tiles with ease and a great range of sizes

I blame myself...buy cheap buy twice. These are not as in the picture. No dimensions on the bits at all, very thin metal...just rubbish. Nuff said.

Did the job

Good

Item arrived in a sealed plastic bag, the cardboard envelope inside is empty like its been opened. The actual item inside arrived rusty.

Drill on lowest speed still spins out on a tile. Better off spending for one with a pilot drill. These dont have measurements on either