I usually find that these new fangled tools that are meant to make our life easier are usually a waste of money, try running cables in a 1900's house, wood lathe plaster walls with most of the lathe at the bottom where its all crumbled away, 7 0r 9 inch skirting boards and suspended floors on brick pillars with a load of joists, noggins and supports as well as the rubble the original builder dumped under the floor as well as the old conduit and even sometimes to old pipes for the gas lighting.
It must be an American invention.............
I'll just stick with a hammer a bolster a skill saw as well as a length of trunking lid.
Maybe I should patent and sell my tool for knocking a channel out behind skirting boards, hmmmmmm