AWESOME I will keep these on hand for as long as I have my current serger. It is impossible for me to thread without a tiny beading type needle. I am unable to buy the old kind I used to use and then I lost my last one that worked last week. Then I found these online through Amazon. I have put the 5 spares in a small baggie with the package. And then I have a small plastic box that I keep one in near my serger. Yes if you drop these they will be hard to find.