3 inch Diamond Hole Saw Bit for Glass, Porcelain, Quartz, Granite, Ceramic Drill Bit Tile Hole Saw Diamond Drill Bit with Drill Guide Included Glass Hole Saw Circle Cutter Tool

These really worked nice. I only needed to cut a few holes. I think you could really cut quite a few holes with these if you keep the water flowing while cutting. I cut through porcelain tile in under 1 minute using my drill press with tile submerged under water. No problem keeping whole saw centered while cutting using drill press. This was a concern as there is no pilot hole. these worked an order of magnitude better than expected. I purched one to see if they were any good then purched a set plus the 3 1/8. I would highly recommend these. They cut just as good as the $56 for a single hole saw that I purached. May not last as long as the $56 one, but then I also only needed to cut 3 holes for this bathroom project. The harbor freight hole saw could not cut through a single piece of porcelain tile. These are even cheaper than harbor freight and the work very well.

I used this in hard granite and it was easy to start, cut fast and easy, and did a nice clean job. I used the EVA foam guide with some water and it worked well. I was dreading drilling this hole, but it only took 1-2 minutes to cut through 3/4" slab. I only needed one hole so I can't vouch for how long it will last, but based on how fast and easy it was I expect it to be durable.

So far so good. Cut through glass like butter. Use plenty of water.

For my bathroom remodel we needed to cut a few holes in porcelain tiles for shower plumbing. This did the job so long as I sprayed water from a water bottle over the tile while my dad drilled. Can't say it would last much longer than a few tiles but the porcelain was pretty hard and it did what we needed it to do. If you are someone who will need this for multiple jobs I'd probably keep looking but if you are doing one bathroom it is worth the price. Incidentally though, if I were to do it again, I might have just stuck with the smaller one I got and used it multiple times to drill a bigger hole since the smaller one fit into the drill jig we bought here as well.

I bought this to cut through ceramic wall tile when doing a bathroom re-plumbing job in a former rental property. The previous owners did a hack job on the tub/shower so we had to convert to a new single lever faucet. This hole saw worked amazingly well and made a super clean cut. Things you NEED to know. There is no way to freehand this hole saw, you need to get the guide this company sells to hold it centered until you get the hole going. Otherwise you will skate it across the tile and really scratch things up. Trust me, I tried it. Second, DO NOT use this without cooling water. This is a two person job, one runs the drill the other keeps a trickle of cooling water running on the saw blade. Lastly, common sense! You will be pouring water on a metal saw blade attached to a metal drill chuck attached to a drill motor. I used a cordless drill so as not to get electrocuted....:)

Very smooth cut, and I was able to actually shave 1/8" semi-circular cut outs from a previously cut out small diameter circle.

So this bit cut very well, The reason I am giving it three stars, is it does not co me with a pilot bit. This means that you have to tilt the bit on an angle and drill very slowly to keep the bit from hopping around.. This means most people who don't use tools a lot will struggle to get a hole started where they want it drilled at. The it does cut good but for 19.99 not having the pilot bit kills the purchase. Be sure to look for a diamond hole saw we with a center drill bit/pilot bit. It will make things so much better. The shipping that was provided also was packaged nicely

Drilax 3” Diamond Hole Saw - Bought this to cut one hole through a 1” granite slab and it did the job. As many others have mentioned, it’s critical to keep the cutting surface wet and run the drill at a very low rpm. I was working with a small piece and was able to place it into a shallow basin with the water level just even with the top of the work surface so the saw was constantly submerged, but building a dam with plumbers putty as others have mentioned would be the way to go for a larger piece where complete submersion isn’t possible.As an aside, it is possible to saw through wood with this. I cut a hole in my vanity’s 3/4” bamboo counter top with this to reduce splintering that occurs at the start of a cut. Even more so than with stone and tile, it’s critical to run your drill slowly to avoid heat build-up as you don’t have the cooling benefit of water. I actually ran my shop vac right next to the bit to provide a bit of air cooling; just like an old VW Beetle!