I read many reviews before buying this product. I had to drill through the brick so I figured this tool would do the job and in the end it did, but it wasn't easy. I first drilled a center hole in the brick for the tool to follow a bit. But I was only able to penetrate the brick about 1/8 inch before giving up. I then drilled 3/16" holes around the full circumference of the 75mm hole I had started. I turned the center of the hole to about 1/2". This gave the tool a head start and it was fine from there What made this job difficult was the fact that I was standing on a ladder and couldn't use my full body weight.