All "gears" spin independently of each other. Stumped my pops, hasn't happened in my lifetime. Thanks!
From a German website: Russka
Dermapuncture anti-pain roller This massage method can promote blood circulation, relax muscles and thus relieve pain. The uniaxial Dermapuncture anti-pain roller 100 has 560 silver-plated needle tips and is used for smaller parts of the body and joints, such as: B. forehead, temples, neck, shoulders, hand, joints and for foot reflexology massage.
The two-axis Dermapuncture anti-pain roller 200 has 1360 silver-plated needle tips and is used in full-body massage.
Article no.executionPZN73030 100Anti pain roller 1000272151973030 200Anti pain roller 20003885097