I bought these and immediately used a couple of them for a project I was working on. They drilled right through the concrete floor in my shop and did a great job. Highly recommend.
This set of bits was purchased for my son. He does work for me around the house, and, I bought these bits to help him with the "honey do's".
if you do any masonry drilling at all, and most will have a need at some point, you're going to like this set.It contains the most popular sizes and has the Craftsman quality.I really like mine.
This set comes in a clear plastic case not what is shown in the picture.