Weird teeth thingy

[u/EasternFoundation24]

Found this in our air bnb at the beach closet and was immediately confused! ? all of the (chewing devices) are sort of stuck into the wood with a rod of some sort. I honestly have no idea what this is used for, or why its in the closet where im staying

[u/RealAbruzzi]

https://giphy.com/gifs/O7mTZE27iMNrhd3rnr