I picked up one of the mini SDS Milwaukee hammer drills. Hadn't used one before this, but while working on my commercial job, saw the sprinkler guys and sheet metal hangers using them (m18 fuel versions) and decided to get one. Only I cheapo'd out and picked up a corded version for under $200. I have a big bad old spline Bosh for big holes thru concrete walls but was fairly fairly unaware of the mini SDS ones . (except for Hilti guns versions) It is awesome for punching the hanger holes and even for drilling the tapcon holes it takes one tenth the effort and weights half as much as my makita powered hammer drill, or my Makita cordless drills. Old dogs can learn new tricks.