5 1/2 Inch (140mm) Diamond Hole Saw with Pilot Bit, 5.5" Tile Hole Saw for Granite, Ceramics, Porcelain Tiles, Marble, Glass, Stones,1 3/8" Depth of Cut for Thick Countertops

The core drill cut a clean hole in my granite countertop without trouble. The pilot drill that comes with the core drill is high speed steel and is not intended for hard surfaces like granite. This should be listed in the description but since I did not need it I felt 5 stars was still appropriate. The way this drill is used is to start at an angle and slowly straighten the drill up. This creates a nice channel (kerf) for the drill to follow and I did not have any wandering. Keep the drill wet which provides cooling and tends to float the cut material out of the cut. I just used a wet sponge and periodically dripped water into the cut. Pull the drill out and spin in water to remove grit and cool the bit. I only needed one hole so I don't know about longevity, but it certainly worked for me. I would buy this again. Just don't rely on the center pilot bit unless you are drilling something relatively soft.

This was a one time repair. If the saw I chose at Amazon cuts one hole properly, I’m happy! “I’m happy”. This 1.5” saw did great! Be sure to read included instructions about pilot drill use and saw cooling. It states to remove the pilot drill after the saw has started the cut. This could be a challenge to keep saw from hopping out of hole location and damaging area next to the started circle. Suggestion, clamping thin wood with same hole cut in it over the proposed hole location may keep saw where it belongs while drilling. My story if interested. I had mildew at bottom of wall under the diverter in the shower. Bleached it and came back so time to investigate before we got sick from mildew. I lucked out and chose exact (6x8) tile to remove for the inspection and repair. There was a slow constant drip drip at the diverters plumbing connection at hot water side. Made that plumbing repair and then dropped bag of Damp-Rid on a rope into the wall until it hit bottom. Got considerable water in the bag over 2 week period. New bag, same, no more water and no more mildew appeared, time to close it up. I made a cardboard template where to cut hole in a tile saved from home construction, then marked the tile on tile back-soft side. See pics. The cut through the hard glaze was quick, I doubt saw got too hot so cooling the saw probably wasn’t necessary in my case but made cut in container of water anyway. Drilled from the soft back side. Some minor chipping occurred, perhaps placing tape over the glazed side would help.

Amazing product. Worked very well and very fast. Cut through concrete backboard and ceramic tile like butter.

Worked as it should. It seemed a little dull almost, and required a good bit of pressure to make the cut. But, overall, it made a nice, clean cut and didn’t damage any tile.

The tool drilled a perfect 5.5 inch through porcelain tile. One person poured water from hose while I slowly pushed down on drill. Did not use pilot bit. Used template out of kerdi board to keep hole saw centered.

Worked great. Used it to cut a hole in new granite sink for soap dispenser. Cut through quickly like it was nothing. It was so fast I didn't even need to spray with water. Used the centering bit until the saw made contact with the sink and then removed it to cut through. Nice clean quick cut.

This drill bit cut thru my granite countertop easily. I highly recommend these bits. Make sure you spray water on it while you drill.

The hole saw was packaged securely for transit and was needed to cut the center out of clay saucers. The first two saucers that were cut went very quickly and had a great smooth edge. The third saucer took much longer to get through but still had a smooth edge. The fourth saucer was very difficult to get through and took forever but still had a great edge. Unfortunately, the diamond cutter was no longer sharp enough to get through a fifth saucer. FYI: The saucers being cut were not true clay throughout. The outsides were barely coated with clay and the centers appeared to be a harder substance. Either way, I was only able to cut through four saucers before the diamonds wore out. My next diamond hole saw will be one that is better rated for longer use.

Macht was sie soll, guter Preis

Moi pour percer plâtre et brique creuse, très précis, manque un peu de longueur pour mon cas , et bourre facilement mais vu le diamètre, pour scellement chimique

Excelente

Nickel... Fait son boulot 👍

Works well for black pvc drain pipe through tile.