Review (1/5): if these are genuine Vollrath, then that company has lowered its standards
These are junk! The gear wheel doesn't mesh properly. (It seems okay when you try it while empty, but when you have a scoop of ice cream, the lever pushes against it and the gear teeth go out of alignment, and the whole mechanism locks up. Hard to explain, but I wanted to point out that the scoop might seem totally fine if you just hold it and work the lever while its empty.)