These are little boxes designed to replace the search tokens in Descent Second Edition. This design is a wooden crate (actually made out of clay) because one of the items that can be found is actually a treasure chest. So this token represents a crate that a treasure chest or any of the other searchable items could fit inside.
Each box is hand made out of clay and oven baked to harden and made ready for actual play on the table. Each one is slightly different but they are all similar in size, shape and color.
Although it is not necessary, they are paintable.