10-Piece Diamond Hole Saw Drill Bit Set with Guide – 1/4 to 2 Core Bits for Glass, Tile, Ceramic, Porcelain, Stone & Granite – Professional Kitchen & Bathroom Remodeling Kit with Storage Case

good buy. Bit i used worked great to drill hole in a counter for soap dispenser. I was able to use the templet to position the bit and hold water for drilling hole. this gives you most any size you need for a little more than buying one bit. the holder / guild worked good and the zipper carry case is nice and not flimsy. i would buy it again if needed. I used to sided tape to hold guide to counter top and hold water in while drilling. it took maybe 30 seconds to go through 1/2" Corian counter top in a camper.( bits must be used with water ).

I bought this a couple years ago and it is a fantastic set. I drilled through my granite kitchen countertop with no problems whatsoever. Just used it again for a tile countertop. It sliced through the tile in about 1 minute. I absolutely recommend.

Firstly, I am originally from the trades, am very mechanically-inclined and versed in many facets of construction. I know good quality tools from bad quality tools. Now....These are definitely not meant for trade use or daily use. I wouldn't call it a "heavy duty" drill set. But they are also not one-time use and they do work IF you know what you're doing. I guarantee the reviews that stated these are junk, broke, don't work or the grit wore away are inexperienced people who have no idea how to properly use these. I also laugh at the reviews that state how bad they are and then coincidentally say "I made sure to use water" after reading the other reviews that say to use water....BS - they did it wrong, trust me. I renovated my bathroom and tiled all the walls. I used the 5/16" hole saw to make holes for my wall-mounted vanity, mirror and tub glass enclosures (12 holes). I used the 1" hole saw for my shower head and tub spout holes. They worked fine and none broke, wore-out or cracked the tiles. All of my holes (except the shower arm and tub spout) needed to be drilled after the tile was installed, due to not knowing the exact locations of each hole. Proper planning allowed me to make sure I had studs or blocking behind the approximate locations of the holes, but the exact locations had to wait until components were ready to be hung, since the hole locations need to be precise. The secret is using the right technique....relatively slow but consistent drill speed, starting at an angle and holding the drill firm and steady just as is touches the tile (this is important, because that's when it will tend to pull the drill, take you off-target and possibly scar the tile where it won't be hidden). The drill needs to be held at this angle until a noticeable arc-shaped groove is made. Then after a slight groove is made, slowly lean it perpendicular to the tile. Once a full circular groove is made, you must stop about every 20 or 30 seconds and use a spray bottle to wet the bit and hole (or have someone gently spray as you're drilling). When the hole is done, stop the drill, remove the hole saw and use a piece of stiff wire or even a toothpick to push out the tile core and muck from the bit (That's why there is a slot in the bit). Yes - the process is a bit messy - but this is the best way to make drill the hole without damage. During the entire process, the drill should not even come close to full speed...I can guarantee that's why most inexperienced dumb-dumbs or neanderthals ruined these bits and wrote poor reviews. These are not high-speed bits (nor are most bits intended to drill through tile, glass or granite). Knowledge and technique is everything. You should practice on some scrap tiles first. If you're not up to the task, you may want to solicit some help from someone with a bit more experience and take my advice that I use often in which I echo Dirty Harry's sentiment: "A man's got to know his limitations".... NOTE: I purchased this item on Amazon for full price and have no affiliation to the seller. I try to write helpful, unbiased and insightful reviews because I also read reviews prior to making my own buying decisions. I notice many reviews lack helpful information, are not well written or give poor reviews based on not following directions, failing to read the product details prior to purchasing, inexperience or lack of skill. Writing useful reviews helps pay it forward.

I purchased in January 2021 for $44. I actually needed 3 of the sizes that this 1 kit came with. I went to several tile shops, supply houses and looked online and I found that price of just ONE of their bits was more than this set. I figured worst case scenario, I would burn them up, finish the job and pitch them in the trash! 2 years later and I have absolutely punished these bits and they haven’t slowed down a bit! I’ve used them on porcelain and ceramic tile, 2 granite countertops and the ultimate torture test was drilling through 3/4 granite tiles. I needed 4 inch round holes that kept cracking when trying to use a grinder. I decided to use these bits to drill multiple holes to make the 4” hole and it worked great! You can use the foam backing pad that holds the bits to CENTER it since the bit itself doesn’t have a centering bit. Get the hole started by holding the foam piece with one hand, fill it with water to keep the bit cool, then start the bit slowly with the other hand. I used a Dewalt battery drill and they worked great. I do keep them cool with water and low RPM’s while using them. I’ve even let a friend borrow them and they are still good. The ONLY CON: They are not deep enough to go all the way through a granite countertop. Bit is too shallow. So you can either start the top and go as far as possible then tap it out with a hammer. Or start the top and go as deep as possible then switch and approach from the bottom if you need to. For all tile including porcelain, just take your time and keep the bit wet and cool and they work and will last! Work great on tile backer board also! Definitely recommend them though!

I purchased this hole saw set for a bathroom tile project, I needed it give me a few clean cut penatraions through porcelain tile for clawfoot tub supply and drain lines. Im a homeowner I wasnt intrested in longevity or repat use really so I gave this set a try. I believe another customer review involved the use of a prefabricated "template" or Jig to assure alignment and stability while cutting so my plan was to do the same. Unlike traditional hole saws there is NO PILOT bit to guide you, in my opinion some type of template is a must, freehanding seems impossible. It performed perfectly, I also powered through the Hardie Board subfloor, below that is an old wood floor so of course I switched to a wood bit for that final layer. The bit heated up a bit and shed some of the chrome coating but I was very pleased with the results, I offer these pics to illistrate. I also grabbed for the bits to help bore out the ID of a 1 1/2" PVC pipe fitting in desperation I needed a male adapter to work as a trap adapter. I was shocked when I pulled this off,( I didnt learn that trick in plumbing school). The bits work with an abbrasive cutting edge, the case that it comes with is pretty handy it holds bits tightly in place even when dropped off the work bench. Impressive. I'd buy this again and recommend to a friend.

Awesome bits and storage case. I was refurbishing an old outdoor table and in doing so I put new tile on its top and needed to drill a hole in one of the tiles for the tables umbrella to go through, they worked flawlessly! I have since used them when retiling my shower, again they worked flawlessly!

Got these bits promptly. Very satisfied with the performance of the product, so far. Used a 1" bit in a Porter-Cable drill/driver to cut a plug/hole all the way through a 2" thick slab of limestone. Since the bit was not as "deep" as the slab was thick, I had to drill as far as it would go, then smack the limestone plug with a 1/2" rock chisel, then remove that material from the hole, before continuing to drill even deeper. I had to do this twice before finally drilling all the way through the slab. I also kept water on the drilling site by utilizing a used margarine tub into which I had drilled a 1" hole, then used some putty on the bottom of the tub to keep it in place on the slab, then poured water into the tub. Twice I had to add more water to the tub during the drilling process. The total time required to drill through the slab was about three-four minutes. The bit probably would have done the job faster, but I'd never drilled any holes in/through rock or concrete, so I was may have been more cautious than necessary...but, maybe not. After completing the job, I was surprised to find that it looks like there is still enough diamond/cutting material to drill at least two - and possibly - three more 2" deep holes before it becomes useless. Obviously that is just an estimate, as I don't know if the diamond/cutting material that remains will maintain the standard of cutting I was achieving. I'd like to say that I will come back after cutting/drilling more holes so that I can report my actual/final results, however I only needed to drill one such hole, so my thinking is split between the following two possibilities: 1) on the one hand - I'll save the bit for the possibility that I might need it for another project, rather than wasting the rest of the cutting/diamond surface just to find out how long it will last, but 2) on the other hand - I'm thinking that for just $24.99 for the ten piece set, I COULD afford to test that one bit. And, if I did, it would at least serve as informative for the purpose of potential future purchases of this same set of bits. At least I would KNOW how much drilling could be done before it became too worn to drill/cut anymore (at least when used on limestone). Doing so would allow me to make a more informed buying decision if I need more rock/masonry bits for bigger projects of this sort down the road.

First off, for the price, the bits were a good value. I got multiple sizes of diamond bit for less than $40 and they did work great for the first 2 holes in 3cm granite. 2 holes each were their max though, and that was with constantly drilling in water at a slow rate for around 30-45 seconds, vacuuming the hole (water and particles both), then rewatering and repeating until all the way through. The 2" hole bit held up better than the 1/4" bit in granite, but neither will be usable for a third hole which is a shame because I need to drill four 1/4" holes and not just two. I have since purchased a different brand 1/4" bit and it cut both of the other holes without issue and still has diamond abrasive material on the tip following the two holes. Those other bits were more expensive though so like I said in the title, you get what you pay for. Obviously if you are cutting through softer or thinner materials you'll get more holes cut with the bits. Note: These are not deep enough to cut through 3cm granite without having to cut from both the top and the bottom and ensuring that you keep the holes lined up. I had to cut from the top with the 2" hole saw, then realign and cut from the bottom to get all the way through. I knew that going in and am not downgrading the product based on that, just wanted to make sure everyone that reads the reviews understands that.