Diamond Hole Saw Bits with Pilot Drill Bit

[Size: 4-1/2 Inch (114mm), Number of Items: 1, Size: 4-1/2 Inch (114mm), Number of Items: 1]
Update to my previous review. Amazon sent a replacement. The replacement came in a lovely plastic storage case and was packed by amazon in a box instead of a flimsy envelope.The drill bit worked beautifully, making a nice clean cut hole in my porcelain tile. I definitely recommend this profuct.

[Size: 1-1/4 Inch (32mm) 2-Pack, Number of Items: 2]
Worked great for drilling holes in glass aquarium tanks. Cut cleanly and did exactly what I needed it to do. Very happy with it.

[Size: 1 Inch (25mm) 2-Pack, Number of Items: 2]
It drilled right thru my composit sink with no trouble

[Size: 1 Inch (25mm) 2-Pack, Number of Items: 2]
I was pleasantly surprised by the quality of this 2-pack of 1-inch diamond hole saws. I needed them for drilling clean holes in porcelain tile and granite, and they performed far better than I expected. The included pilot drill bit made it much easier to start each hole without the saw wandering, which saved both time and frustration.The diamond coating cuts efficiently and leaves smooth, professional-looking holes with very little chipping around the edges. I used one bit on several porcelain tiles and a piece of marble, and it stayed sharp throughout the project. Having the option to use them wet or dry is also a nice bonus, although I found using a little water helped keep the bit cooler during longer cuts.The build quality feels solid, and both hole saws appear to be well-made. They're perfect for installing plumbing fixtures, running pipes, or creating clean openings for hardware in tile, stone, ceramic, and even thick glass bottles for craft projects.Considering you get two high-quality diamond hole saws with a pilot drill bit included, this set offers excellent value for the money. The cuts are fast, clean, and precise, and the durability has been impressive. I would definitely buy these again and highly recommend them to anyone tackling tile, stone, or glass drilling projects.

[Size: 1-1/4 Inch (32mm) 2-Pack, Number of Items: 2]
Granite is a lot like glass but has fault lines. Pretty tough assignment for drilling. It took a few minutes to cut through a granite tile but my drill is also limited to a slower speed and my angle was not ideal, leaning way over a kitchen sink. Water seemed to help after the cut was deep enough to hold water.They do give you two hole saws and pilot bits. Only needed one and some patience. I would buy this again.

[Size: 6 Inch (152mm), Number of Items: 1]
If it come with the plastic dust connector. It will be perfect.

[Size: 4-1/4 Inch (108mm), Number of Items: 1, Size: 4-1/4 Inch (108mm), Number of Items: 1]
I grabbed this diamond hole saw to have ready for whenever we need to put a big clean hole through tile or stone, and just handling it, the quality caught me off guard in a good way. It's got real weight to it, the diamond grit around the rim is packed dense and even instead of thin and spotty, and it's honestly a nice-looking piece. Which doesn't matter one bit on a saw blade, but I noticed anyway.The little pilot bit in the middle is a smart touch. Anybody who's tried to start a big hole saw on a slick tile knows they like to skate all over the place before they dig in, so having that pilot to hold your spot should take a lot of the pucker out of lining up the cut.The case is better than it needed to be too. It's a solid canister that screws open and shut, way nicer than the sad cardboard sleeve or baggie these usually come in. For something with a diamond edge you actually want to protect, that's the kind of thing that helps it survive being tossed in a tool bag.Full honesty, we haven't cut anything with it yet. My husband's just waiting on a project big enough to need a hole this size, so it hasn't met tile or concrete under power. Everything I'm telling you is about how it's built, and on that front it's off to a great start. I'll circle back once he's actually run it and let you know how it bites.For now it's making me optimistic. The size is right, the rim looks tough, and the whole thing feels made to last.

[Size: 4 Inch (102mm), Number of Items: 1]
Have you ever wondered how they cut circles in tile before they had a drill. They used to use cut up tiles like a mosaic. Then there's the saw blade where you start at the edge and work in then use a wire blade. Sometimes they just made custom tiles with holes in it and worked with that. But usually they would use 1" tiles and make do.Today we have the convenience of not just a hand drill, but a power drill. but still, a 4" hole in tile? With a pilot bit in the middle designed to cut through tile and the larger hole saw, this thing is meant to make easy work of cutting circles in tile.Most people know that diamonds are hard, and expensive, but ever wonder what happens to the dust and chips after they make diamond rings. Or even diamonds to small to do anything with. They make drill bits. Tiny ones all the way up to huge ones for industrial use.Today's technology allows them to embed diamonds in a way to make hole saws cheap enough for the average user. While this is not industrial strength it's not meant to. You need a hole in a few tiles and this will do that with ease.Do they make better ones that last for dozens of cuts, sure, but do you really want to spend $200 for your DIY project, one bathroom, one tile, of course not.So what size do you need? The toilet probably uses a 3" pipe, sink drain about 2". Simply add an inch to what you have for a pipe and get that bit to match. You may need to also take into account the mounting bolts or drill separate holes for them. If the decorative trim for your pipes aren't that big, you may need to go with 1/2" larger than the pipe. Just some things to take into account.This isn't just a good price, it will get the job done and sit around waiting for the next time you need it, and few more. And you got to save a few bucks.