BGTEC Dry Diamond Drill Bits 2pcs 1/4" with Quick Change Hex Shank for Granite Porcelain Tile Ceramic Marble

I'm about done with a tub to shower remodel. After breaking a few porcelin tiles trying to drill my valve and shower openings, I was worried about installing the shower doors, afraid of ruiining even more tiles. I called a guy to do the job, but he never got back to me so my search for a diamond drill bit began. After reading the reviews, I decided on the 5-piece set. Here is what happened. Following the suggestions, I used the pointed tip to start the hole. Once I scratched the surface of the tile, I used the round head (#1) to do the drilling. It worked, but each 1/4" hole took 10 minutes on constant pressure. Not fun. After 20 minutes and two holes, I switched tactics. First, I used the pointed tip to go deeper (say 1/8" deep). I also started dipping the tip in water every 20 seconds or so. It only took a minute to got 1/8". Then I switched to another round head bit (#2) and (dipping it in water every 20-30 seconds) after 60-90 seconds, the hole was drilled. NICE!!! The remaining 7 holes were drilled in 15 minutes ro so!!! I even went back to bit #1 and it was just as fast as bit #2. So, the differemce was dipping the tip in water (contrary to the suggestions by the manufacturer).....That's why I gave this product 4 stars (and not 5). Hope this helps some of you out there!!! :-)

I would highly recommend these if your working with glass or tiles or porcelain. Save you a lot of time just buy them and you will see.One of the best purchases I made in 2023!!!! Very happy will buy again .

It worked, but NOT the way I thought it would. Installing a grab bar I was ready for a nightmare - our glass tiles are near impossible to drill.... First three holes took half an hour with a slow speed etc. and I figured I'll have to use a second drill bit for the next two.... since there was nothing to lose and drill has a hex drive, I put it in my Bosch 12V Impact driver... drilled at full speed, dunking it in a glass of water every 20-30 seconds when wax started to smoke; Finished three holes in less than five minutes!!! What's more, "diamonds" seem all there and bit looks great. I am still scratching my head, but, there you are - my two cents! YOUR RESULTS MAY VARY ;-)

Purchase these dry diamond drill bits to install two ADA grab bars in my bathroom. There where a total of 10 holes that I need to drill through porcelain tile set on 1/2 " thick concrete backer board. It took two bits and approximately five minutes for each hole to get the job done given the density and toughness of the porcelain tile. While I was drilling the holes, I had my son spray water occasionally to keep the bit from overheating. I highly suggest the method described in many reviews, of using painters tape in area where the hole is going to be drilled as well as placing the bit tip at a slight angle to keep the bit from sliding. Once a small indentation has been created on the surface of the tile the drill bit can be straighten. I would recommend avoiding the use of excessive force and allowing the drill bit to slowly grind the porcelain tile to the desire depth. Overall I found these drill bits effective but not very durable.

Even though these are wax cooled bits add water to make drilling much easier.

I recommend these drills just finished a ceramic installation very durable would recommend these tiles to anyone doing ceramic work or a ceramic replacement. Price is extremely well recommend this product and purchase from Amazon.

Items were as listed. Worked great

Work as they should.

Efficace. Cependant je conseil d'attaquer le carrelage avec un forêt béton pour faire une petite empreinte de façon à ces forêts diamant se centrent.

Perçage de plaque de marbre. Dommage que l'intérieur ne soit pas évidé

chi ha già avuto a che fare con questo tipo di frese, sopratutto se usate su piastrelle di gres, sa che al primo foro funzionano tutte benissimo, al decimo in tutt'altro modo.. Quindi la bontà si misura principalmente in termini di durata. Ecco: queste frese hanno un buon rapporto prezzo/durata e le ricomprerei.

Nous avons utilisé un seul forêt sur les deux, et le foret utilisé semble encore largement utilisable… Nous avons fait facilement 7 trous dans des dalles extérieures de grès cérame de 2 cm d’épaisseur…en faisant couler un peu d’eau froide sur le trou pour refroidir… Très efficace, en commençant bien de manière oblique au départ, pour mordre la dalle avec le diamant, et faire la marque du trou.Conseil: il faut faire le trou légèrement plus grand pour arriver à placer la cheville, et surtout ne pas visser à fond la vis dans la cheville, au risque de casser la dalle (c’est ce qui nous est arrivé avec la première dalle qui s’est cassée au moment où nous vissions).Très contents de notre achat.

For this price, they really are a disposable product. managed to get 3-4 holes from each diamond bit, then it's onto the next one.The pointed bit is much better though and has worked flawlessly during the installation of new bathroom fitments onto Porcelain tiles.All in all, a good product, cheaper by miles than well known brands and for the one off project ideal.