Rokrou Diamond Hole Saw Set 15 PCS Tile Hole Saw Kit with Drill Guide from 6mm-50mm /1/4‘’- 2” for Ceramic,Glass,Porcelain,Marble

Bits work great but the guide not so much!

One star off because one of the bearings was off and loose in the box. Thought it was missing a screw, but found it. The diamond saws , is what I expect. Not any better than others I have purchased and not any worse. Use water and they will give you good life. The suction on the guide was weird. It stuck good on tile but did not stick at all to a non porous formica top. Wish there was some sort of case though.

Bits have lasted many holes Guide is helpful

Excelente...

This kit worked well for the application. However, we had to buy a specific bit for our job as a 32mm was not included in the set. It seemed to have virtually everything else. I cannot speak to longevity as weve only used it once after we bought the size bit we needed. The suction cup did slip a little but didnt hurt anything.

Im installing a bathroom in my basement, and the shower is 100% tile, clay tile! I needed to install the water flow/temp control valve so I had to cut a 2 hole in the tile. I figured I could use my roto-zip with a tile/ceramic bit. I was wrong! I burned up 3 bits and only got about 70% of the hole cut. I purchased these cutting bits and they work great! I took the 2 bit and it ate through the tile in 15 seconds. Then I had to cut a 3/4 hole for the shower head, and it zipped through like a champ! I cant speak for longevity, but initial efficacy is outstanding! 10/10 would recommend.

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. Dont 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.

The little bracket thing falls apart every time and I only got two uses out of the bits

Works perfectly. Follow the instructions about low drill speed and plenty of water. Keep it clean and cool and can cut many holes.

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 youre 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 doesnt loosen so you lose the bit in the hole! If youre 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.