10-Piece Glass Concrete Drill Bit Set, Masonry Drill Bits for Brick, Plastic and Wood, Hex Shank Tungsten Carbide Tip Drilling Tools for Mirror and Ceramic Tile on Concrete and Brick Wall.

Added to my Bosch hammer / drill. good quality bits and a very good price.

I had quite a few concrete anchors to install and figured a five-pack of Bosch would leave me with three or four left unused. Boy was I wrong. I finally called it a day with those when in a particularly hard section of concrete one broke in the hole, and the next one seemed to be drilling nicely into the hole, but when I pulled it out it was a snub-nosed bit. The bit quite literally had melted in the hole. That is some poor quality steel. In the process of drilling in that area I ended up losing three bits and had five anchors snap. I had to get something in, and at the rate I was losing bits I figured I needed to have a whole lot, so I ordered this set of 10 bits. Fortunately they came the next day and I got to work. Long story short, I'm still using the first bit. It easily drilled the holes in that area and a whole lot more areas, and still is working fine. Yup, I'm impressed, especially since I've always ordered Bosch for all of my concrete bits including for the SDS-Max. I really am impressed, and thankful. I had to get those in for an inspection and was starting to panic a bit.

These did what I expected from tile-capable drill bits. Slow going but they get you there. However, my first set wore out after only a few holes. I complained and the manufacturer sent me a replacement set. In the meantime I bought a different brand and there were not very capable of drilling ceramic tile at all. It made me realize how good these bits are, albeit maybe not very durable. But the other brand instructed me to use cooling water. Hmmm. Because I was drilling into wall tile in a bathroom I wasn't able to keep water flowing. But I did start (with the replacement set) to dip the bit into a cup of water after each minute or so. I had to sneak up on the hole diameter - they are very slow going - but with a bit of patience, bob's your uncle. And the bits appear to be as good as new. Time will tell. So I'm revising my rating to 4 stars. I would prefer these bits not need cooling and last longer drilling dry. But maybe that is unreasonable at this price point. The comparison in drilling between these and a similar product is night and day. So I'll live with the negatives and will not hesitate to buy more when these get dull.

Have done 20 holes on one bit so far. They drill great. Getting a bit more dull but still drilling. For the price they are definitely worth the 11$ a bit. Only drilled rocks for splitting. Been holding it wide open on a DeWalt drill with frequent breaks to cool in the snow to not overheat. Keep them from getting too hot and it'll keep drilling.

works as expected

Cross tips work better than these

Very sharp for the first couple of holes I drilled. The tile and concrete I was drilling was the hardest I've ever drilled. Before buying these I had already destroyed 2 other bits drilling 4 holes. This bit made it through 4 more holes. I would buy them again.

These bits did not hold up in in my Bosh sds hammer drill. They both only held up for about 30 minuets of drilling each. I was drilling thru a masonry - fieldstone cellar wall. When I hit a harder rock they quickly were destroyed whereas other bits, dewalt and bosh just stopped drilling but were not destroyed.