Worth EVERY penny.

There are times when I'm sure our walls are made of solid reinforced concrete. We had a bloke came for some job or other, may have been to fit the Aerial cable through when we, finally, migrated to Satellite TV. However, be that as it may, whoever it was shot through the cavity wall like a hot knife through butter. (relatively squeaking). I duly grumbled about having to turn my old drill into a "hammer-drill" by battering its blunt end with a wooden mallet. "AH." Says he, "What you need is an SDS drill". How right he was, I doubt if I've used it much more than 1/2 doz times, but "HEY marra!" well worth every penny.
Hands up if you ever saw an advert "Do it neater with >>>>>"?