Poolshaft Stinger, by Fury, Quick Release Joint
https://www.biljartwinkel.nl/poolshaft-stinger-by-fury-quick-release-joint
https://www.biljartwinkel.nl/media/catalog/product/cache/2/thumbnail/9df78eab33525d08d6e5fb8d27136e95/1/2/12-912-05-7_200-stinger_schnellverschluss.jpg