a bead that has a tension button.  I don't have a pic because i don't know what they're called.  It's used to hold 2 pieces of string and slides up or down when you press the button.
I see them sometimes on stretchy pants or cargo pants.

I need these!!  Please help.
Thanks.
Kristin.

*my first post...woohoo*

i found this site: http://www.mcgillsglass.com  with super cheap products ($1.33 for a soldering iron!!)

has anyone ordered from here before?  i'll eventually get an order in and tell you how they are.

Thanks. Kristin