Thanks Stick. I am transferring a pattern for a child's rocking chair right now and I forgot all about these. I probably have over 50 in various sizes.
If you use them for a more permanent hold, you can squeeze and remove the chrome handles but make sure you put them somewhere where you can find them again in case you need to remove the clamp and where the better half won't dispose of them. Been there.
Basically, a tool is an object that enables you take advantage of the laws of physics and mechanics in such a way that you can seriously injure yourself - Dave Barry