Eyelet Eyelet

I think it's called eyelet or eyelet lace.

Eyelet is a type of material, similar to lace, usually a holey fabric.

There several eyelet setting kits on the market with complete instructions, some of the newer eyelet kits are not as effective as the older ones, the most common problem is the wrong size hole for the size eyelet, what ever size eyelet you use, use the proper size hole (most kits have hole dies for that size eyelet) and follow included instructions.

Do you mean in hooking up for aerial sound, that there is a wire with an eyelet?