A hole plug can be used as a decorative item in many Maker/DIY applications. It may be glued into a shallow round hole drilled or otherwise formed in many materials. Interior and exterior applications are possible depending on the material selected for fabrication and adhesives used. The plugs may also be painted or stained to obtain more complex color patterns.
The plug in the back has a length of about 0.75 inches and a drawn diameter of just under 0.25 inches, although its actual diameter may differ slightly depending on the material chosen for fabrication.