Beehive Nest Strip Doors Metal Entrance is made of solid metal, strong, and durable to use. A great tool to avoid bees from escaping. Install it on the beehive to make it easy for bees to go in and out. It can also protect the bees from attacks of mice and insects  Essential beekeeping tool for beekeepers. Use these in the autumn when mice or other rodents may be looking for a warm winter retreat, prevent the nasty little critters from eating honey, pollen, and even the bees, destroying comb and generally disturbing the brood nest.