Tying copper to a micro swivel

[Chaff]

What is the best knot to tie copper to a micro swivel. Any info would be greatly appreciated thank you. 

[greenboatluke]

Haywire twist


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[Tyee II]

Haywire with heat shrink tubing over the twist.

[djw13cwru]

x2 on adding the heat shrink. I also keep some in case I need to repair a copper on the lake....not that I have ever tangled one so bad I had to cut it and splice it back together.