This is a Meal Grinding Wheel for turning grains into flour, scaled from 28mm wargames and roleplaying games. This might be a great addition for inns, taverns, and dungeon kitchens.
This is a sample piece from the "Inn and Tavern Set 2 - Kitchens and Food" available at Hero's Hoard http://www.heroshoard.com/inn-and-tavern-2
Enjoy!