 | Author: R. Brome (Philadelphia, .. | I only needed it for one small project, so I can't comment on longevity, but it did what I needed it to, drilling through brick, concrete, and I think even some solid stone (it was a very thick, 175-year-old foundation wall.) I used it with a Bosch hammer drill and it worked well with that. | 7 |
 | Author: Podge T | I was happy that the drill bit arrived quickly. I was even happier when it drilled through my concrete steps like they were made of butter. After drilling 6 holes this bit still looks almost like new. I cleaned it with a little WD-40 and put it away for the next masonry project. I can highly recommend this masonry bit and also the seller (Century Drill & Tool Corp) who shipped the bit without delay. I will definitely be back to Century the next time I need a bit. Oh, I forgot to mention the excellent low price. This bit was a truly outstanding value. AAA | 6 |