A drone comb is used for honey supers (larger comb size= less wax=more honey. And it’s easier to extract!), also used for managing the levels of varroa mites within your hive. Insert in to hive, allow them to build up comb, once larvae’s are capped, remove the frame and put in the freezer. It’s an easy way to eliminate a large number of varroa mites within your hive. This can be used time and time again.