Diamond Hole Saw Diamond Brazed Hole Saw Kit 10PCS Tile Hole Saw with Guide from 6-50mm /1/4"-2" for Tile, Drill, Glass, Marble, Granite

Works well for suction cup does not home

Needed to drill thru our brick home and foundation stones to install a new furnace. Was initially impressed at how well the 2" bit went thru the brick, but then it caught and the drill spun, and bent the bit. I thought it was done, but I put the bit back in the hole and carefully bent it back straight (mostly) and was able to keep drilling. Make sure to hold the drill securely! Have to stop every inch depth and chisel out the brick plug as the bit bottoms out at that point. Next hole was through foundation stone (oolite I think) with the 1.5" bit. The cutting surface got gunked up with the dust from the stone and got stuck in the hole. Ended up having to use a bigger bit to drill around the stuck bit and with much patience and difficulty dig it out of the hole. The shank on this bit then broke off, leaving it useless. I was able to put a bolt thru the hole to get a little more use out of it (see the pic), but not ideal. Maybe a setup like a wood hole saw set - with one shank that screws on to all the hole saws would be a sturdier design. FYI If you're drilling a deep hole, the 3/8 collet forstner bit extender does work with these bits, but the shank on these bits is so short that only one set screw will engage the bit. And be careful that screw doesn't loosen so you lose the bit in the hole! If you're looking for a one time use, or just light hobby use, these bits might work, but any heavier use and they are just not up to the task. Hope this helps somebody.

Perfect for my engineered stone shower insert. I used it to cut holes in the cement board and the stone and it worked well. The suction was helpful to keep the cut in the same spot without needing to go at it at an angle.

Buen producto y lo utizo para cortes en cerámica

I bought this to drill through some marble and porcelain tile for a shower glass panel install. The guide helped in making clean holes and it held well. One of the bits completely bent out of shape on the first hole through the marble. I was still able to finish my install with another bit, with no further issues.

I installed a new quartz countertop and needed to drill holes for the faucet and vessel sink. This kit made it easy to start the hole and maintain the cut. I only made one hole with two different size bits, so I can't attest to how well they hold up. But the suction apparatus worked great and made the job much easier. Great kit for a home owner.

Worked far better than I thought it would. It cut a hole in 3/4 inch glass like a hot knife through butter . The couple bad reviews I read , had to be from people who use it wrong .

Update: Seller contacted me after the following review and offered to replace or refund.Also, after reading other reviews I would like to add a reminder to always use these with water (if you want them to work for more than 1 hole). That goes for any continuous surface diamond cutter. Keep applying water as cutting surface dries. Water will also help flush out the debris.Great selection of sizes for the price. Don't expect to do cut a lot of holes with any one. Found the diamond coating on the inner surface flacked off on the two larger sizes I used. Handy to have the selection of sizes for the occasional use.The slot for debris removal on the smaller sizes is too small. Kept having to stop and try to clean out the debris, which often got stuck inside when drilling porcelain tile. The 1/4" size lasted for about 11 holes going through 3/8" porcelain, thinset, and hardie board (about an inch thick). Should have invested in a good 1/4" diamond holesaw with large debris flute sooner. Way faster.