Beeswax will strengthen your thread and help to reduce knotting in hand sewing. Simply place the thread in the open notch and draw it back and forth several times to coat the thread. This coating will stabilize the thread.
Beeswax has many uses. Try it for lubricating zippers and smoothing the surface of your iron. It is also useful for easing the tracks in sticky drawers and windows.
The handy holder keeps the wax clean and serves as an excellent protective case.