I've used this only in masonry and concrete, and am very impressed. i burnt up 2 brand x drills in stalling a dewatering system for a friend,lots of holes in block and the perimeter of a sump hole in 4" concrete. I was afraid I would burn up my 18 volt drill, so I got this one. WOW.It chewed thru that stuff like butter, even when the bits got dull it just kept churning.I put in an exhaust vent into a 1930s brick house bath room, and I can tell you were that saying comes from. I had to get 16" bits to get thru the brick over clay tile, on a ladder over my head, it did get a little heavy, but it worked.