BOSCH GT2000 4-Piece Carbide Tipped Glass

I bought the four piece set because I needed to drill in my recently completed tile shower wall to hand the shower rod. They worked great, very smooth holes with no cracking or flaking. And, as advertised, they did not walk across the tile like my old bit. Here was my process for using them: I placed masking tape down first. Then, I carefully located the bit on the right spot, and then pressed it into place until I could just hear it crunch a tiny amount. After that, I spun in 1/4 turns so it could make a divot to hold itself. Once the hole was started, I went in short bursts until I cleared the tile. After I was through the tile, I used a regular bit to complete hole.

Some of the best bits I have ever owned. If used properly- they are absolutely the best for tile (ceramic, porcelain, marble, etc.), cultured stone, and probably more. Wish I found these years ago. Used properly they have a great life span.

Cuts glass pretty well, though has gotten dull after about 6 uses. Package shows and says the bits have a "three flats shank" to prevent slipping. However, the shank is completely cylindrical - no flats. Strange they would go to the trouble of printing this on the package when it is not true for these particular bits.

These bits made drilling multiple holes in a tile chimney for a TV mount very easy.

I didn't know what to expect with tile. Needed 12 holes in shower tile for 2 grab bars. Drilled much faster than I anticipated. Gave 5 stars for durability but I only drilled 12 holes. The last hole was as easy as the first but that's obviously not a durability test. I didn't want to imply I knew the durability wasn't 5 star by giving it less than 5 if that makes any sense.

I used all the bits for my job six holes in tile the little one with the 1/8 inch that cracked halfway through so I had to upsize the smallest hole. However, drills worked fairly well. I didn’t expect them to last forever and they don’t but they got the job done and I guess that really all that matters, thank you

How I arrived at my overall rating: ***** (5 star) Value ***** (5 star) Purchase price: $8-$9 Quality/Durability ***** (5 star) Duration of use: 1.5yrs - Nice quality. After using a number of times, bits still seem sharp and capable. Ease of Use/Assembly/Install: ***** (5 star) - Used on lower speed settings, both using a hand drill and a drill press Usefulness/Appearance/Fun Factor: ***** (5 star) - Used this to drill holes in an epoxy project successfully.

I broke a pot by using standard drill bits, to drill a drainage hole for my plants. I found this set, and so far I have successfully drilled three clay pots for a draining hole. I even drilled a hole in a coffee mug and now it houses a plant. LOVE these! I did look up how to use these, and it says to use water so it doesn’t get too hot, which I did. Because it does get very, very hot drilling through clay.