• Designed to be fixed to into a board, to create an escape board
• A bee escape is a one-way door that allows workers to leave the honey super and return to the brood nest during the night, but the board foils their attempts to reenter the box

This is used before extracting honey; place a bee escape board (or crownboard) below your box of honeycomb 24 hours before you plan to harvest honey, and you’ll return to find a mostly empty box.