4mm/12mm S-hook

thingiverse

A simple S-hook. * The small hook has inner diameter 4 mm with a 2 mm opening. * The large hook has inner diameter 12 mm with an 8 mm opening. * The eyelet is meant to attach a pull string and has inner diameter 3 mm. The part flexes slightly, so it holds in place when hooked onto an object. In the photograph, it's hooked around a 4 mm elastic cord and a 10 mm metal bike rack.