how to open clamps

[spixelspixel]

Is it possible to open and re-use these?

http://www.swiftech.com/images/products/detail/clamps38intub.jpg

 

[spixelspixel]

I'm trying but its just not happening

 

[spixelspixel]

They dont want to budge, am I wasting my time or is it actually possible? :/

 

[spixelspixel]

Can't remember if I did, was years ago. The 'threads' on them seem to be one way only. My fingers are so sore I'll try again later