He aha ka manaʻo o ka rivet jumper?

ʻO ke poʻo lele lele makapō: no ka mea, ʻaʻole i uhi ka rivet i ke poʻo kui, e hoʻoulu ai ka rivet i ke poʻo lele.

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