3 Inch (75mm) Heavy Duty Diamond hole saw

The bit is high-quality and the center guide is amazing. I drill the 11/8 inch hole in one and a half inch thick granite like a piece of cake. I mark a dot with permanent marker that I wanted to make the whole, use the guide bit to drill the hole and scored the circular hole at that point guide drill and continued to make the hole in between drilling for the water and dipped the bit in water as well every 20 seconds or so, and I was able to drill a nice smooth hole and less than five minutes. Good value for money. Excellent quality. My drillbit still looks new..

I installed a stone shower and needed to cut the hole for the shower valve. This worked great. I could have gone a bit larger. I installed the Moen Posi-temp valve.This cut quickly and didn't wobble at all. I used a garden hose to add water as it was cutting and probably didn't need to. I only hat to cut one hole with it.

I needed ONE good clean 4.5" hole in porcelain tile and this did the job perfectly! Clamped tile over a plywood piece securely to the drill press table, set spindle speed to 900rpm, using pilot drill and as soon as the cutter touched the tile I removed the pilot drill, slowly feeding cutter while keeping area flooded with a water spray bottle. The cut was super clean and accurate. I could not be more happier, worth the cost for one very important hole for our walk n shower!

This item caused me quite the headache but it's not really the saw's fault. It works great going through concrete, though the tip fell out immediately and didn't really want to stay secure so I just nixed it. The problem is this is very short overall, and if you're drilling a hole longer than it, you need to find an extension. Problem is, pretty much no extension fits these SDS bits. So, it drills really well, but can also get very stuck in a concrete wall if your extension grinds down the cheap metal shank. Just be careful.

The media could not be loaded. So I really wanted a reverse osmosis system in our new house- but had no extra drainage hole in our countertops and didn’t want to hire someone to install the system. I looked on Amazon and found this. We were SO NERVOUS to mess up our counters, but this was a BREEZE. Make a little circle, wet the area (used a soaked paper towel) and then a regular drill at full speed, start at a 45 degree angle and then slowly flatten (see video). Woo! Amazing and the tip didn’t break at all. Thank you!

Why did you pick this product vs others?:The product works well cutting a 1-1/4" hole in ceramic tile. Be sure to cool the hole saw with a damp rag a few times while cutting. Run your thumbnail over the edge to make sure the "teeth" aren't becoming clogged with ceramic dust, and if so just use the rag to scrub them clean. I've cut 4 holes so far with no sign of dulling. I have a few more to cut and I think the bit will be able to make all of them before getting dull. It probably wouldn't last that long on porcelain since it's a harder material. I love the removable pilot drill. I first use a regular metal punch to break through the glaze - just a couple of light taps. After that, the pilot drill won't "skate" across the tile. Pilot drill can be removed for cleaning. Great product.

I installed a RO system on my own and had to drill into a 1.5inch countertop for an additional faucent. I followed the instructions and was able to make a nice and clean hole through without breaking the bit. No issues.

Decent but feel it could be better. I used this hole saw bit to first cut a hole through the cement board in my laundry room. I then used it to cut a hole in the porcelain tile to accommodate the dryer vent hose. It cut thru the cement board like butter but the tile was a little more resistant. It took about 15 mins to cut thru the porcelain tile. I’m the end, it cut a very clean hole but should it really take 15 mins? Perhaps I was being very careful not to break the tile but it sure seemed to take its time.