Sanding pad for a modified electric toothbrush to use as a detail sander.
While it will not sand large items it great for sanding join line, bubbles, minor defects.
I found this on sale £3, most tutorials say cut the brush part off I found that with some pliers you can just pull them out, once you have using a scribe or punch knock the retaining pin enough to grab it with pliers to remove it.
Sanding pad can be glued on with what ever strong glue you have but do not change the size if the whole as you need to put the retaining bi back in, sanding paper is attached with foam doubled sided tape.
The author hasn't provided the model origin yet.