As near as you can tell, this is a missing part from one of the machines in the Madness Bakery.
(In-game plural: popular parts)
Item number: 8383
Description ID: 172388652
View in-game: view
- The Armory and Leggery
- Lending a Hand (and a Foot) (after delivering no-handed pie)
- Fixes the popular machine in Heart of Madness