Put a rubber band on it 0372 ratchet release
thingiverse
Ratchet release for rubber band car. Designed for a 3 mm bamboo bbq skewer axle (They are never exactly 3 mm). The fixed item has a 3.6 mm hole to grip the axle. The moving part has a 4.2 mm hole for free running. See my YouTube video here https://youtu.be/IUemZoG0-Uo My YouTube channel - Put a rubber band on it https://bit.ly/2T3OF4j
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