That is a Wilson Pro knot and he is using cam action pliers. They are just good gripping pliers with no sharp edges or protruding points to put out and eye.
EDIT: a.k.a. Parallel pliers. The cam on the side was designed so you could grip the string and use the cam to pull a tighter tension. I would not recommend that though because with the leverage advantage it is easy to break your string. You will notice that stringer in that video did not use the cam to tighten the knot.
When you're dead you don't know you're dead. It's the same way when you're stupid.
Balance - 31.0 cm, Weight - 358 g, SW - 346 Kgcm^2
Last edited by Irvin : 03-25-2013 at 10:51 AM.