Be warned about FWB Jackhammers! I think that they are reaching the end of their useful life now. I've had 3 (from 4) that have stopped working partially or completely on me in the last 2-3 years. The three in question were all used when I bought them and the last one is NOS. That being said, *I* could be the problem.
They are super when they work though.
They are super when they work though.