The idea is normally it pulls from the eye but if snagged with enough force it breaks the plastic strap and then pulls from the bottom of anchor which should free the anchor.
You use the smallest size you can and carry extra. They are easy enough to break if your hung by pulling back against it. There is a good video on YouTube showing this in slow motion because once the zip breaks if your pulling back it yanks the anchor free.
YouTube
Very cool video . Thanks for sharing
Great idea
I have spent most my life fishing........the rest I wasted.
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I never had an issue breaking the zipties, but I don't use huge ones. Don't use the little dinky ones either though, or they'd probably snap all the time.
If you get to really giving it a pull to break the tie, just make sure you're leaning in a way that you won't tip yourself over!
Damion Kidd LIKED above post