yep, foul tool to use but really effective, but be careful where you use it - they can punch through thin sheet.
Yeah, Gigglepin, that's a great vid of what they can do. Very noisey, Mordzy, I had my ears stuffed with cotton wool. Looked like a miner when I had finished - should have worn a dust mask
Just turn the radio up . Worked for me ;-)
how louds your stereo?
All of it loud... Even drowns out the screaming wife and disgruntled neighbours!