These wire clips are reversible, and work with rubber bands. I used 1.4mm thick bands, but should work up to 2mm. The model is built to lock in the rubber band, once pushed into the part, however rubber bands smaller than 1mm might not stay locked in, however still should work. Diameter of the rubber band does not matter, as long as it fits around what you are putting together. These are reusable, and can be undone, and redone by pushing the rubber band back out from the locked area.