I have used this drill bit several times. It works awesome. It has saved me so much money. I used to have to be in a certain part of the house or outside in limited ranges to get any wifi signal. And if it rained it was a crap shoot for wifi outside or in the garage. I have used it to make my house totally wireless including the garage and beyond. I am not a professional installer, just handy. I would definitely recommend to anyone. Doing it yourself saves you a lot of Ka-Ching $$$$$$$$$$$$. I needed a bit for several jobs to be used with my 1/2 hammer drill. This went through block, brick, concrete like butter. I left it with a worker and when I came back he had ruined my drill. The only reason the drill was ruined is he tried to use it as a chisel and the dust and impact shut the drill down. Fortunately it was under warranty. Oh yea the bit still works.Bought this to drill pilot holes for concrete screws to attach plywood to a concrete slab. Not a particularly difficult task, but the bits (I bought two) became dull after just a couple of holes. Of course, this is terrible performance. In retrospect, I will say in all fairness that I can't quite remember how fast the drill speed was--possibly the RPMs were too high. But, as for me, I'm going to try a different bit next time.As expected-good buy for the price. Did the job.thanksIt seems to be a very good drill bit.worked very wellI got these and opened and all three were rusted at the tips. Terrible and cannot use.Good price & quality. No complaints.