Features:

  • Diamond hole saw / core drill style bit.
  • 10 Sizes: 6mm, 8mm, 10mm, 14mm, 16mm, 18mm, 22mm, 35mm. 40mm, 50mm
  • Application: Drill Glass, Tile Bottles, Blocks Jars, Fiberglass Porcelain Tile Ceramic, Slate Mable, Granite Light Stone
  • SPEED KILLS: Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably
  • Warrnings: Not for use on Concrete or for depths beyond about 1/2"; Enough water is MUST HAVE for lubrication and cooling when drilling
These cutters really work..yes they really do!!!!

I was skeptical about these at the price...had to cut through a newly installed ceramic/porcelain tile floor in our house that looks just like wood planks. Anyway, we bored three holes. 1 inch and 3/4 inch (approx) and this thing cut through it like butter! I don't think a wood bit in plywood would cut faster. Only used 1 bit once, and the other twice, but if you must drill tile, this is the item for it. If you only get one use, it pays for itself. Cut a perfect plug out of the tile with no splintering or cracking whatsoever. I furnished the contractor who did this these bits, and he wanted to buy them from me a twice the price. Said I need to keep for future hole cutting, but gave him the link for Amazon. If you need to drill the new tile planks that are replacing carpet everywhere, this is the one to get!!! Can't just drill through carpet and sub floor anymore. Now we did after getting through the tile and under layment switch to a wood bit, but no problem here. Just drill the tile hole slightly larger than the wood hole. These are really great. Only little complaint is it did not come with a knockout plug tool to get the plug out as advertised, but no big deal. Just used a nail.

Cut through kitchen sink with ease!

I bought these specifically to cut a hole in my sink, so I could install a soap dispenser that came with my new faucet. I started at an angle so it didn't jump all over, kept adding water, & within a minute I cut pretty smoothly through over a 1/2" of porcelain! I can't speak to longevity, but the bit still looks like new after my single use. I'm happy. :)

Travertine holes, no prob

I used two different sizes of the bits for a shower remodel project i was working on. Surprisingly at least to me with the cheaper price tag, these things work outstanding. I cut multiple (3) holes in travertine real stone tile and it left a clean hole without any problems. I would venture to guess as well as they worked you could get a few jobs done before any of these bits went dull. I am not a professional by any means but have 3 houses and do many in depth projects on my own. When using these it is critical that you keep cool water on the area you are cutting and when it gets filled with crap where you are cutting, stip flush it out and then continue. If you treat these things right you wont have any problems, highly recommended.

Good and cheap

I just tried to bore two holes with diameter 18mm and 50mm (the largest bit) on a porcelain tile. I installed the bits on a drill press and used Plummer putty to make a ring to stick on the tile and pour water inside the ring to cool the bit when drilling. It just took a minute to drill a 50mm hole on the tile and it looked perfect. See the attached photo.

Great Bits For A Good Price

I've tested several of the bit sizes, drilling through stone, marble and tile. They worked very well, leaving nice, smooth holes, and the cutout pieces retained smooth edges as well. I used a drill press on it's lowest speed setting. My stone were placed in a plastic Chinese food container, with water added just enough to cover the piece being drilled. I used a variety of C clamps to hold the pieces still. I drilled very slowly. Very. My pieces were all about 1/4 inches thick, and I literally took 5 minutes or more to drill through. I read that slow was the key, so I did that. I'd apply light to medium light pressure for 5-10 seconds and then lift the bit a little to clear any debris out of the way. The water did get very muddy fast, since it was still water, but since I had it clamped, so I knew where I was going. I've not used them much, so I cannot speak to their longevity. I'd recommend these bits to anyone needing an inexpensive round hole cutting set of bits.

You will need to cool the bits as you drill

Bought them to drill holes on a quartz counter top. They performed admirably. I drilled about 12 holes with 22mm one and it is still going strong. Two things to watch out for when you use these bits though. 1. You will need a hole guide unless you are very experienced. They will stay in place after they bite, but in the beginning it is hard to control the drilling position. You can try to solve the problem by going in at an angle but it is not the easiest method. I drilled a larger hole on a piece of scrap wood as a guide. 2. You will need to cool the bits as you drill. I filled my drill guide (that piece of scrap wood with a hole) with water and constantly top it off. The water also prevents any dust from forming and prolongs the life of the bits.

Great value and fully functional!

I Needed these bits for drilling holes through ceramic tile/concrete backer board to mount a glass shower stall. I was able to drill about 12 holes with the smaller 8 mm with no problems, however the bit is almost worn out -- which actually exceeded my expectations. I also used the largest bit to cut out a 3" x 3" hole with multiple passes in the middle of a tile to fit the shower handle. These bits have no center pilot bit. I've found the best way to center the bit to get it started using a thin piece of wood with a hole the size of the bit in it and then position the hole in the wood right over my mark. Perfectly positions the bit and prevents drift when getting started. Use a wet towel to keep the tile and bit wet with water. Stop often to wipe the bit with the wet towel to keep it cool. Otherwise, like any bit, it will fail quickly.

perfect for random needs!

i can't speak to how long these last since after drilling 4 holes with the same bit (through about 3mm of glass, under running cold water), i finished what I was trying to do. so not much data, but it's really promising! i cannot differentiate the used bit vs the others (and that was ~20min of drilling). these seem to really last! and what a great price! notes for newbies (like me, whom don't own a drill press), under water works initially, but eventually the water gets cloudy and I bet that's not the best way. if you just: do it in the sink, with your drill jammed in the corner (for stability, cuz you don't want to skip and scratch the glass surface), (and you'll be tilting the drill into the glass vs just using it normally) and cold water streaming over the point of drilling (ya, I'm a total newb with glass drilling, got no terminology), and most importantly: patience, with a light touch (initially VERY light touch, and extra patience) then you should be able to pull it off. oh and also, i fired the holes after drilling, so do beware the holes are sharp, it is glass ;) now to think of something to hold all the bits, they didn't come with a container.

Great for drilling glass bottles

. FINALLY SOMETHING THAT WORKS! I’ve been looking for something to drill holes in liquor bottles for lamps & misc. I’ve been talking to people at Lowes & Home Depot for *months*. Not once has anyone recommended these. I scoured Youtube videos & finally found a tutorial that demonstrated exactly what they have succinctly done with their step by step drawing. Not only do they work as described but you receive all of the sizes for this low price. That being said, I’ve only been using them for 2 months and I have *always* used a reservoir filled with water while drilling (use plumber’s putty, roll it out and then join together and seal a “wall” around where you want to drill. With the *plumber’s* putty it will hold water until you get through the glass, obviously the water will go through your hole so you made need to safely (if you’re not using a cordless) have some water poured onto your hole as you finish drilling) & I’ve only been drilling liquor or wine bottles thus far. If they break on me...I’ll update this but I have to say for the price compared to other drill bits I’d have to take that into consideration.

Excellent hole saws, unbeatable price!

Cannot beat these for the price! Used them to complete tile upgrade to tub and shower surround. Without these the job would have been impossible. Used several of the enclosed sizes and all worked to perfection; a couple of them were used multiple times and remained sharp enough to easily cut through large / thick porcelain tiles. The variety of sizes were very useful, allowing us to complete the job without any of those "oh no!" moments that so often happen during DIY projects.

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