Picus said:It's not. AFAIK (might be wrong) it's the heaviest of the 3 popular rotaries (Hitachi, Makita, Dewalt). Running the Makita one hand at the lowest speed on a flat panel isn't too tough, or dangerous; but there is an element of risk. I've done it a few times on SUV roofs, but try not to.
FWIW, the Makita is a lot lighter than the Dewalt. I haven't used a Hitachi, but I believe it's of a similar weight to the Makita.