This may have been my own mistake. I have no idea what you would use these tiny needles for---I have nothing that would go through any of those eyes! I watched the tutorial about how to choose beading needles, but didn't discern that these are NOT for regular beading cords. I have large eye needles that are very long and I wanted something shorter but as flexible. The tutorial wasn't clear about which ones would fit Fireline, Power Cord or AccuFlex . I can't use them, and can't send them back. Very disappointing.