4 Inch Diamond Drill Bits Glass Hole Saw Drill Bit Set for Glass Ceramics Porcelain Ceramic Tile Marble

Worked surprisingly well. I used it to cut through stucco/concrete exterior wall. I wanted to install a round 4-1/8 receptacle for a security light and this cut the perfect size hole. Not deep enough to cut through completely, but got me most of the way there. I just used a 1/8 masonry drill bit to drill around and finally, a couple taps with a hammer to break through. Had this been about 1/4 deeper inside, it definitely would’ve cut through completely. Go slow and use a spray bottle to keep it wet. I cut two holes in a wall about 1-1/4 deep, still plenty of life left.

I used this to remove a screw on which the head had rusted and crumbled. It was used to mount a shower slide bar and we didn't have more replacement tile, so I needed to get the screw out. I measured the broken screw's mate's diameter and determined that these 6mm hole saws would work. Using the hole saw, I drilled through the cement backerboard around the screw. I went pretty slow as I wasn't able to use any water to cool or lubricate the saw. Probably took about 10-15 minutes. The screw came loose just as the hole saw broke, and lodged in the hole. After removing the problem screw, I just used a larger-diameter screw to bite into the inside of the broken hole saw and pulled it out. I was pretty hard on the saw, putting a good amount of force on the drill, and for the price I would consider this a consumable and a good tradeoff for getting the job done. I can't speak for other use cases but for mine, it worked very well and the price meant my DIY repair was a good value.

Used it to drill through my marble counter, works well

I'm a remodeler, and purchased this hole saw to cut a hole in tile for a shower valve. Being so large, I wondered how I could get it to accurately cut a hole in my tile without it wandering and scuffing up the surface. I did three steps which made my hole cutout perfect. First I cut a hole in a piece of backerboard using the hole saw. This piece was to be my cutting guide. Then, I cut a piece of sponge and put it inside the bit so that it would release water and cool the bit as I drilled my hole in the tile. I positioned the backerboard on the tile and clamped it there. Then I soaked the hole saw and sponge in water and proceeded to cut the hole in the tile. The sponge and water kept the bit cool and the backerboard template kept the hole saw from wandering. It was a perfect cut! This bit is by far the most economic way to cut a clean hole. The bit is already much duller that when new, but it will work great for several cuts, but not many more than that. Keeping the bit wet and cook is essential- otherwise your bit might not last more than one or two holes. There are many others costing 10x more and made for daily use, but my use was one or two times only, and for that, this bit was perfect.

Wish I would have bought this sooner. I hate cutting toilet holes in porcelain tile with a grinder. Frequent cracking with the grinder is greatly reduced. It still is difficult to do a complete hole in the center of a tile without cracking but half holes along edges are super easy. This diamond drill makes everything way easier and produces way better looking results. Also is the exact size needed so no time wasted with layout.

I needed to drill out a broken bolt. These bits are very expensive at the local hardware store. I took a chance on this pack of 15. It went through 14 of them, but it was cheaper to get this pack than ONE at home Depot! I know from past experience that these expensive bits last longer, but I don't think they last 15 times longer, so I think this might be the right choice for many jobs.

It’s not a top quality tool, but it will work. It doesn’t have an arbor, so you have to lay into it on an angle and bring it up straight. I used it to cut a hole in a glass block window on both sides for exhaust duck. Got the job done. It doesn’t have any reliefs for heat. I wouldn’t purchase it to do a lot of holes.

This 7 1/4 inch hole saw does not rate even one star but this Amazon process requires a rating to post. This hole saw is a very poor joke at best; it does not have a pilot bit or even a provision to add one, therefore no way to stabilize the bit for a precise cut; which is why they call it a PILOT BIT. In fact this hole saw would most likely just skittle and scuff your tile like a buffer. Please note that the majority of positive ratings are for other products like 2 1/4 in hole saws. Also please note the fact that the images are all of the side and back of this item, none showing the disturbing lack of a pilot bit for stabilization. Seems deliberate to me.....shame on Jamikury the seller.

This hole saw works well. I needed to cut a shower valve hole in a 12 x 12 tile and it did it nicely. I ended up cutting a guide block out of wood, then clamping it to the tile. I submerged the tile and guide block in a concrete mixing pan and filled it with water and had no trouble cutting the hole. It took about 5 minutes to cut at slow speed on a cordless drill. Recommended.

First use broke into 2 you get what you pay for

خامة ضعيف مختلفة عن الصورة

Percé 2 trous dans comptoir marbre

Etremely recomended. Cuts through tile like butter. Very easy to use, high speed at the start since it does not come with a pilot hole drill bit. Buy with confidence and guranteed.