Product review (5 stars): They're zip ties!
What else can I say - they're zip ties.  They zip closed, and that's about all I need them to do.  The zip ties come packaged separately in vacuum sealed bags which is great.  However, I was concerned because the bags have written on them, "Do not open until ready to use."  Wait, what?  Do zip ties go stale?  Will they run away if I open them too early?  Will they be offended if I don't use them right away?

I bought these ties to hold the zippers closed on my luggage while traveling, and they fit perfectly through the locking holes.  They are also easily opened with a nail clipper.  Perfect!