Dry Diamond Drill Bits Set, 5 Pcs Tile Drill Bits for Porcelain, Ceramic, Granite, Marble, Stone, Glass Hard Materials, Round Shank 1/4", 5/16", 3/8", 1/2" Drill Bits, with Storage Case

Drilled through old powerline insulator in about five minutes. Pictures are of the first one I drilled through so it’s a little bit sloppy. Entry and exit wounds will probably chip. Tips and tricks: I’d say stay at the 45° angle longer than you think you need to and then slowly move to be perpendicular to your service. Very slowly. This might take a full minute or more. If you try to go perpendicular too fast, you will slip and make the scars that you can see in my pictures.

I bought these to drill through oyster shells to make ornaments and they worked perfectly! I kept running water over the shell and going slowly and they worked like a charm. The set had different sizes but I ended up only using smallest one. I went in at an angle first then at a 90 degree angle once the hole was initiated. Worked great!

Product cut through porcelain tile easily and worked well for the purpose purchased. I thought it was a little expensive but in the end, it saved me time on the job and saved me another hardware shopping trip. Only drilled 5 holes with a bit, so not sure how long it will last, but did not seem to show wear by the 5th hole. You have to start the hole on an angle and then straighten up to prevent the bit from walking but that is the same with any product when trying to drill smooth porcelain tile.

Received a box that contains the bits in a small hard plastic case (Sliding cover, like a drawer). There is a metal 1/4" bit (? carbide) and 6 diamond hollow tipped bits as follows: 1/2" (1), 3/8" (1), 5/16" (1), 1/4" (2) and 3/16" (1). The case tray has 5 slots to store all 7 bits. There is a small paper pamphlet guide. The diamond tipped bits look cheap, but work well, and function as small hole saws, without the center guiding tip. They are meant to be used dry, meaning you don't have to cool them in water periodically. The solid metal bit (1/4") has an arrow tip and will need to be cooled (Wet use). For the price, I did not much high expectations, but they work well. I used them to drill through tile and stone walls to mount a shower and bathtub enclosures. They are a keeper and would recommend for the occasional home DIY user, but likely not for regular heavy professional use. Thank you.

Wow granite is a tough material to drill. These bits worked very well cutting 3/8 inch screw mounting holes in a granite plaque. Using a slow water feed rate from a watering can mixed with some dawn dish soap and the drill wiggle proved to be the best way to bore the holes. A 1/4 bit provided a larger semifinished 5/16 hole due to the wiggle motion and cutting of the material, then used a 3/8 inch bit from the assortment to clean up the finished hole. Did use the second 1/4 inch bit only to discover it still took 15 minutes per hole to chew through at 650 RPM. Drill bits held up well and still have more cutting life left in them. Happy with results and quality of the bits.

Worked for what I needed but the shaft is extremely easy to bend. Still happy with them considering the price

The right tool for the job. I cut into this tile easily following directions. First come in at a 45 degree angle and it cuts like butter. 5 stars. I drilled 4 holes to hang the light and mirror combined. Easy job.

I used these drill bits to install a grab bar in my tiled shower. I am 80 years old and never drilled holes into tile. I followed the instructions provided in the package and made 6 holes for the grab bar with ONE 5/6 in drill bit. Worked great! I used the Youtube video from "Steve Johnson installing a grab bar SD" as my guide. EXCELLENT content! Worth the investment for the drill bits.

Bueno

I used one bit to drill 20+ holes in porcelain tile for a new shower install and no issues. There seems to be some wax in the hole to help with cooling, but I’d recommend keeping the bit wet. Drill on slow setting worked best. I’ve used a tile bits from other brand name manufacturers and these lasted longer.

Super Bohrer, funktionieren einwandfrei. Gutes Preis- und Leistungsverhältnis

Los he probado varías veces y trabajan muy bien, no dañan para nada las superficies cerámicas y es una excelente opción en lugar de una broca de concreto.

Needed it to drill a hole in a ceramic vase and it worked perfectly! Clean cut and no cracks or flaking.