Baban Diamond Drill Bits Set [20Pcs], 4-50mm Diamond Coated Core Hole Saw Drill Bit Set, Hollow Core Hole Saw for Glass, Ceramics, Porcelain, Ceramic Tile, Marble

I needed to drill holes for shelving in my newly decorated bathroom and I was worried these weren't up to the job as they were so cheap. I needn't have worried as they did the job perfectly! I used a floor tile on one wall of the bathroom so these were thick tiles. I used a water spray frequently to cool the cutter down as I drilled and that may have helped. They are quite small in size height wise, but don't let that put you off. I drilled 6 holes with the 8mm bit and its still perfectly useable. As someone else has pointed out, they don't come with sizes but it is pretty easy to figure out. Would definitely recommend!

One time use tho. So not as good. :(

Got out of trouble last xmas when I was refitting my bathroom.Drilled many holes in my 10mm thick porcelain wall tiles all different sizes.The one i used most was 6mm for hanging furniture to walls.The trick is to keep a cup of cold water on the floor and keep dipping drill bit in to clean and cool off every 10 seconds or so. Apply med to firm pressure whilst drilling at slowish speed and don't over heat tip.These bits are cheap and very basic but if you have an engineering background and know what to expect they will do a job and drill a hole.Not going to lie they ain't top quality but they will do a pretty good job and they certainly got me outer trouble .

Don't have much to say, they work well, but as they don't have a centre pilot drill it is a bit more tricky to get the cutter to cut in the correct place.

For the price I paid, I expected these to be fairly cheap 1-shot tools.I was pleasantly surprised. I've been using the same bit to cut drainage holes in the bottom of whiskey bottles, and haven't seen any degradation in performance after 8 bottles.The range of widths you get is also rather impressive. I can't speak to accuracy of the hole size, as I'm just using mine to cut drainage holes.

Neede a drill bit to drill holes in pots for my bonsai did the job great

Terrible. Good for two holes then blunt as hell. Used the 10mm and it just blunted after a few uses. Hopeless

Do the job perfectly