When I bought the hydraulic power pack for my log splitter it came with a jackhammer and three bits. I've never had the occasion to use it.
My brother is converting the 'ruin' in his garden into a B&B and was charged with the responsibility of digging a track for some of the utilities.
Beneath the paving was a bedrock of sandstone. Two days with a hammer and chisel had cleared about a foot. In despair he asked if I had a tool that might make life a little easier.
I took the jackhammer over this morning and in three hours we excavated the trench. It's a heavy hardcore piece of equipment. Those guys you see on the roadside make it look easy.