This might be the best money I ever spent on a tool! As an owner of a home with concrete block walls and a concrete block garage, I struggled for years using a hammer-drill to do the simplest of things (hang mirrors, pictures, shelving, ect.). My house is old and the block would dull masonry bits after 1 or 2 holes or less. The Bosch Bulldog Extreme is like a hot knife going through butter. I recently added a large front porch and was able to drill hundreds of holes through wood into concrete and concrete block with just 2 bits, without sharpening them, and they are still useable. I could drill a 5/16" hole 4" deep in a matter of seconds with very little pressure. It is simply amazing. My only regret is I should have bought it sooner. I own several other Bosch tools and I now understand that Bosch is the brand that I will trust for a very hard working tool that will last.