THINKWORK Diamond Drill Bits, Hollow Drill Hole Saw Set, 10-Piece Tile Opener with Hole Saw Guidance Fixture, Suitable for Ceramic, Glass, Tile, Porcelain, Marble

Used these to drill some bottles for my daughter. She syringed the water whilst I drill the holes for her soon to be lamps. Clean holes and no issues with the product. Would recommend.

The suction cup was not the best quality

Quality made works well. Start on a small angle and slowly work your way into the material won't walk on you and works very well

This hole saw set is better than I expected. With all of the drill sizes that come in this set it should fill pretty much fill any homeowners needs for drilling any hole up to 2". The quality of the drill bits is very good with plenty of grit, both outside and inside, to quickly cut thru porcelain and ceramic pieces. The diamond grit stayed sharp thru more than a dozen holes with no signs of wearing out. The centering jig is super easy to set up the hole alignment and the suction cups hold the jig tight to the tiles without slipping at all during the drilling process. I'm recommend this set for anybody needing to drill multiple holes over the course of any remodeling project you have, needing a set like this.

I bought this to put in 4 anchor screws with sleeves for mounting a new Toto toilet's little mounting blocks onto porcelain slate tiles over lt.wt. concrete. The holes needed to be exact per the provided template.The orange guide would not stick to the cleaned tile since the suction cup's center only lifts a tiny little bit and so has minimal suction. Wet, dry, cleaned with alcohol, etc. made no difference. There was no way to adjust it, so it is a defective design. A simple flick of a pinky finger would move the guide over. It was also hard to hold in place manually since the lever handle is right where one has to lean, and so it is painful on the hand and wrist bones. So it was worthless....Any sort of sturdy L-angle would have worked equally or better in getting the bit started instead of skipping along the top.After the first hole, the drill bits took about a minute to go through the 1/4" thick porcelain tile with a 20V drill on the low setting. Two holes ended up off by 2mm due to the guide's shifting, and the bits do not have enough diamond grit on the sides to 'shave' the hole over to the correct location, and were too short to set the plastic sleeve, so I had to overdrill the holes up a size too big, and go buy other longer bits to finish the job and get the sleeves sitting flush and be glued in.I will never use the guide nor bits again since they don't do their job well at all, and most fasteners where one has to drill holes into tile and with cement board, concrete or cinder block behind it to mount something would have plastic or metal sleeves and be longer than an inch or so deep, and conduits (which I wasnt doing) would need to go all the way though.On the good side, the hollow bits never got hot when used with water, but required cleaning often since the center got packed tight with a porcelain shards and wet dust that had no grooves or means of pushing it up and out the side-hole.

Like a knife through butter. Stayed sharp. Accurate cuts. Great value.

Clean precise cuts. Ordered ase but sent metric

Works great to make holes in the shower for grab bars and shower accessors that you want added. Also used this to install a folded shower seat.

Me han servido mucho para azulejo y piso dal gres aun despues de varias semanas de uso.

Pour perforer tuile

Funcionó muy bien para realizar orificios en cuarzo (mármol sintético), para la colocación de llaves de agua en la cubierta de una cocina. El soporte para evitar que la broca se desplace también es excelente ayuda. Solo hay que tener cuidado en tener la broca bien refrigerada con el uso de agua constante al realizar las perforaciones y mantener las revoluciones del taladro a una velocidad media.