Sample slots for holding 3mm pieces together using O rings. This allows you to have a more forgiving fit with pieces but still keep the parts snugly together.
Also lessens the chance of a customer breaking their acrylic items trying to snap them together.
Suitable for both wood and acrylic materials.
Orings shown are EPDM Rubber 5/16". You can find them in matching colors for acrylics online.
Free File Friday #22