ColumPRO Porcelain Tile Drill Bits Set, 5PCS 6mm Dry Diamond Drill Bit for Granite, Ceramic, Marble Stone and Glass.

Amazing product, arrived on time and extremely good quality. Highly recommend.

Got these after breaking my regular blade type tile drill which normally cuts through like butter but I realised I probably only ever drilled ceramic and not the porcelain in my new place. I was nervous about drill speed and limited it to 600rpm initially but it was taking too long. Did some research and running at up to 3000rpm is OK and makes the job faster though a bit more heat and smell of the wax. The 45deg angle start takes some practice. I've done 5 holes in double layer (don't ask!) porcelain and there's plenty life left in the first bit. Took a star off because the bit is not perfectly straight and wobbles a bit.

Would definitely buy again

They are as good as localy bought items at a price you can afford

These contain a cooling wax, which aims to reduce the need to watercool. This is handy, but once the wax runs out, you have to either buy a new set or find a watercooling solution.Other than that, they do work as expected. As the wax isn't replaceable and the overall feel of these is not the best quality, they're OK for what they are and as a temporary set.Therefore not the best value.

all good no probs here

unfortunately broke the glass, maybe other buyers have different experience

Poor quality drills. They look anodised in the photos but are just covered in red paint. One drill is blunt and one grinder is slightly bent, (so making it useless in a drill). Got me through a tile, will probably be good for a handful more. Grinder but struggled on a thin ceramic tile.