British National Beehive Excluder works by separating the brood nest from the boxes where the bees will store their excess honey, helping keep the hive organized and making honey harvesting easier. Using a queen excluder helps a beekeeper be more confident of where their queen is in the beehive, making it easier to find her among the frames. Our queen excluder is designed to fit all beehives and is simply placed flat above the boxes where the queen laying eggs and below the boxes where honey is stored. The spaces in the grid are perfectly spaced large enough to allow the smaller worker bees through the holes, but small enough to exclude the queen and keeping her from entering the honey boxes.