THINKWORKDiamond Drill Bits, Dry/Wet Brazing Hollow Drill Hole Saw Kit, 12 PCS Tile Opener (1/4"-2”) with Double Suction Cups Hole Saw Guide Jig, Suitable for Glass, Ceramic, Tile, Marble, Porcelain

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 used these to cut through my quartzite countertop. It worked great! I used them in my Ryobi cordless 18v drill at a low speed with lots of water being poured over the cut while I went.Don't be fooled by cheaper options without the clamp - that suction clamp is worth the cost of this tool in the first place. When you're starting a hole, it's virtually impossible to do well without the bit wandering without the suction cup tool. I started the project with a standard diamond bit but no tool, but stopped and ordered this to prevent damage from the bit wandering. There's just no good way to drill reliably and accurately through the surface without a clamp like the included one.With that in mind, the suction cup tool bearings are showing some corrosion after only one use. I figure at this price point, and with how infrequently I'll use them, it's still a good value. Just don't expect the tool to last forever.

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.

I will not be using these on a regular basis. I needed to drill a hole in my counter top for a water thingy. Figured for the price, just get the set.I attached the drill to my MilSuckee drill and easily drilled through. I took my time and dipped just the tip in water to keep the bit cool. Something tells me I could have just turned it up to 11 and drilled her right out, but I like to take my time.The plastic suction cup holder in place thingy was not used. The width of it made it impossible to keep my hole in line with my existing faucet, and we can’t have that.Nice, clean hole and the bit remained intact afterward. Definitely would recommend this set.

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.

May not be for daily use by a professional but it worked well and did a good job. For occasional use and with the low price it is great.

This feels quite cheap but it works. I drilled a few holes with it and on the first use the little wheels that attach to the tile suction mount fell off as they were installed upside down. I flipped them over and tightened them down and it worked great after that. Suction works well if you get it wet first. Bit cut well also.

Great bits for drilling my planters. Wide variety of sizes.

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.