Rigor, here is a clip regarding fish grip.
http://www.youtube.com/user/HALIBU77.../4/Kqjb4q70z44
Fish Grip
http://www.kayakfishingsupplies.com/...sh-Grip/Detail
I have the Berkley, cost a lot more than the Fish Grip, but not liking it too much, too hard opening the grip. Im thinking about buying the Fish Grip after seeing the clip, it look more natural way of opening the grip.
Hope this helps...