Clipstick

This print is the head of a Clipstick, a useful tool for rock climbing. It is used to pace carabiners into bolts out of reach. Especially when approaching the first bolt.

The attached stick is expandable up to 4m. E.g.: https://www.kaufland.de/product/352792200/

Its thread is 18x5mm. In case you need another thread let me know.