Ok, my 120volt impact driver, is rated for 240 ft/lbs of power, which I
believe, it whipped off nuts on my type 2 like nothing. It is a double
insulated 7.5 amp 900 watt motor. That means if you can invert 900 watts of
power you should be good to go. This thing is NOT small however, it's
actually bigger than my air impact gun. I bought it at Canadian Tire, but
it's just the same gun as marketed by numerous companies.

http://www.canadiantire.ca/browse/product_detail.jsp?FOLDER%3C%3Efolder_id=1408474396673423&bmUID=1225662116276&PRODUCT%3C%3Eprd_id=845524443308583&assortment=primary&fromSearch=true

Courtney