These drill bits are good value for money. I did quite a bit of work removing old brick from a 4 x 30 wall and these bits did the trick. He went through the brick like butter. They were defeated and set off. Mostly a large bit was used which I had to sharpen several times and will most likely need to be replaced. What I went through surprised me at how long it took. I recommend these beats for the money. They last a long time when doing small jobs, but when doing larger jobs you may need to buy more than one. These beats were mostly made on bricks. I noticed that it takes a little more strength to hit specific spots.