I'll second the motion from kennyd...........I utilize a Northridge planishing hammer way more than I'd ever use the wheel.

The one + for the wheel is it can make larger panels quicker than the hammer could ever.

If you doing smaller repairs & not actually building qrtr. panels, roofs, door skins, etc. then the hammer is the way to go.

Just a note though........buy the best planishing hammer your wallet will allow. There is a lot of junk units on the market.

Prices range from almost reasonable to down right out of sight!

REGS