They're not manual) but if you happen to already own a Cuisinart, there was an optional citrus juicing attachment that included three different reamers--one for lemons and limes, one for oranges, and a large one for grapefruit. It works very well. This is it: http://www.cuisinartwebstore.com/deta... . The reamers themselves nest for storage; the one shown is the one for grapefruit. I'm guessing it's cheap because it was probably discontinued.