These handy 1/2" cubes have a 3/16" hole through the center which is perpendicular to the magnetization direction. This means that the poles are located on two opposing sides without the holes. These cubes are great for suspending metal objects and signs from a string. They can also be used to hang a string from a metal ceiling or beam. The string can be knotted or looped through the cube to secure it. These cubes have thousands of applications.