(moved) Heavy Tweezers

THIS DESIGN HAS BEEN MOVED TO YOUMAGINE:
https://www.youmagine.com/designs/heavy-tweezers-old

Reasons:
http://marcuswolschon.blogspot.de/2014/01/leaving-thingiverse.html

These are heavier versions of the tweezers at http://www.thingiverse.com/thing:1091 .

I found the originals to be too thin to grab something.
I also added some flat tweezers to the mix.