I love these things. They come in handy when you're asked to do something "amazing"! I wear one on each wrist. They stay close to the skin so there's no chance of getting caught on anything and breaking. They're pretty strong for what they are and very hard to see in performance. So when you need to make a light object float or move across a table, these are what you would want to do just that.

I just bought a package of these because I needed to do some magic on the fly and ran out of time to tie any loops. I must say, I was a little concerned about the durability and visibility of them. Then I walked into the place where my club was performing, fluorescent lighting, the worst kind next to sunlight. I did a haunted deck because I could use my hands to shield the direct light and pulled the effect off without a hitch. These loops didn't feel as flimsy as the ones I tied with PET 2 and were just the right length. After we left the building I slipped them back on the card and was pleased to find it snap back into place like new. Unlike some thread that stays a little stretched. I'd say use the cheap stuff to practice with and these to perform with. Thanks Yigal