It's a chain wrapped in two gears
https://www.amazon.co.uk/dp/B0BC93W54L
I had this, but it didn't last long before it broke.
https://www.amazon.co.uk/dp/B0C3MG9MDT
I'm currently using this:
I'm currently using this:
Autism is a neuro-developmental condition characterised
by difficulties in social interaction and communication,
as well as restricted and repetitive behaviours or interests.
Life on the Spectrum
by difficulties in social interaction and communication,
as well as restricted and repetitive behaviours or interests.
Life on the Spectrum