"We deliberated for ages whether to buy this or a more expensive one. Given we were only planning on drilling two holes, we went for the cheaper option - fully expecting it would break!
We drilled two holes through very thick old (c1845) brick walls, to relocate a couple of cables which had been drilled through window frames. The drill bit did the job perfectly. We pre-drilled the hole a few centimeters to start off, and then switched to the larger bit.
Very impressed and it looks in just as good condition as it did when we got it, so fully expect to get more use out of it."