Wat docht bline rivet jumper betsjutte?

Blinde klinknagelspringkop: om't de klinknagel de spikerkop net omslacht, sil it de klinknagelspringkop feroarsaakje.

https://www.yukerivet.com/news/the-core-of-the-blind-rivet-is-not-completely-pulled-out-what-is-the-reason-for-the-fracture/