Naon anu dimaksud ku jumper paku keling buta?

Hulu luncat paku keling buta: kusabab paku keling henteu ngabungkus sirah paku, éta bakal nyababkeun sirah luncat paku keling.

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