BOSCH GT100 1/8inch Carbide Tipped Glass

Worked great .. I was able to drill holes in my planters that had no drain holes

Needed to install some holes in ceramic tile. This easily did the job. Make sure you're not attempting to drill into porcelain!

I've been making knives. I need to drill pin holes into hardened steel. Not as easy task. I bought the 1/8" 5 pack. The first one did great. I drilled about a dozen holes before the shaft shattered. The 2nd bit drilled 1-1/2 holes and it just stopped drilling. I am using a cutting fluid oil. That is a must. Drill slow. With a bit of oil I drill till I break the surface. I back off and add more fluid. I dill about 1/3 the way and back off for more fluid. Then 2/3. Then final punch thru. Holse are clean and look good. I'm not sure why 1 bit lasted for about a dozen holes and the 2nd lasted for 1-1/2 holes.

This drill bit went through very strong thick tile in order to drill for a toilet paper roll holder. We recommend!

I’ve fought for dang near 2 weeks on a broken valve cover bolt that I ended up snapping part of an ez out bit in trying to extract it. I just received delivery today and put the bit on my drill and just gave it a shot to see what it does and it ate right through the hard and steel easy out and the broken bolt within less than 30 seconds of me actually drilling. Bosch has gained a lifetime customer with me. This Bit cost me a fraction of what I paid for other bits and methods to remove this bolt. It barely chipped the bit after I used it but I’m so damn happy.

If you are using this bit for porcelian tiles, then you batter have a lot of time on your hand. This baby cuts perfect but takes a lot of time because it constantly needs to be cooled. this is not good on a heavy duty construction project with lots of holes. The smaller versions cut better. I have found that using the small holes and gradually increasing the size give the best results but this is a time consuming process. These beat the core drills in that if they were faster; they doo not need to be cleaned out after every hole. Plus there is a very clean hole with no chips at all. If you are impatient stay away the harder you push on these the more quickly they will get dull and can even bend. Slower speeds work best.

We use them everyday! The only product i will buy

worked great

The Bosch GT300 1/4-Inch Glass and Tile Drill Bit is a reliable and well-engineered tool that delivers excellent performance for both professionals and DIY enthusiasts. Designed specifically for drilling through glass, ceramic tile, and similar materials, this bit stands out for its precision, durability, and ease of use. One of the most impressive features is the carbide spear-point tip, which provides smooth and accurate starts with minimal walking. This makes it ideal for delicate surfaces where precision is critical. The tip design also contributes to clean holes with reduced chipping, even on brittle materials. During testing, the GT300 maintained its sharpness and cutting efficiency across multiple uses, outperforming many comparable bits in its class. The bit also handles low to moderate drilling speeds well, which is crucial when working with fragile surfaces like glass or porcelain tile. Another highlight is the build quality. Bosch’s commitment to manufacturing excellence is evident in the consistent performance and longevity of the bit. Whether used in a cordless drill or a drill press, it delivers professional-grade results. In summary, the Bosch GT300 1/4-Inch Glass and Tile Drill Bit is an excellent addition to any toolkit. It offers a perfect balance of precision, durability, and value, making it a go-to choice for anyone needing clean, accurate holes in tile, glass, and ceramics.

Usamos a broca para perfurar porcelanato e foi ótima.

Great product and quality

Lo usé para instalar una barra de seguridad en la ducha del baño. Entró perfectamente y no resbaló en el azulejo.

Shorter than expected based on the pictures - the unpainted part of the shank is only 40mm. The shank is fully cylindrical, with no three-flat design. I used it to drill through tiles. The first hole went well, but the second felt noticeably harder, so I wouldn't expect it to last very long.