Here, cause I know some people don't understand. I don't have the 8" Knipex with me, but they would be comparable to the Kleins. So this is the standard high leverage Klein diagonals, the newer Channellock E338 (Extreme Leverage, as opposed to the old model 338 high leverage, these have longer handles, smaller rivet, and the rivet is placed closer to the throat of the cutter for more leverage), and the Irwin/NWS Fantastico cutters. This picture demonstrates how increasing your leverage leads to a smaller MAX jaw opening vs how wide you need to open the handles.
Many people either don't realize, or forget that NWS makes regular high leverage cutters too, but we just don't see them out here. The Fantastico model is more of a "speciality" or "purpose made" cutter.. they won't excel at general use for most people's need. The jaw opening is small, and the handles need to be fully open to even achieve that much. Your hands do ALOT more moving, and most people will not be able to even open the handles that wide without readjusting the pliers in your hand..
This is why I say go with the Knipex, or even the Klein for that matter.. I've beat on my Knipex cutters all the time and they have no signs of wear. They are some of the hardest cutting jaws you can purchase. They are the perfect "only own one pair" diagonals. Look at how MASSIVE the bottom of the jaws open on the Klein compared to the Fantastico cutters. The Channellock is in between..
I had the older channellock 338's too.. ruined them in 2 hours at work the first time I used them. The takeaway from this is as follows, unless you're cutting something small enough to fit ALL THE WAY into the back of the jaws of the NWS, you'll have no real benefit. The further away you are from the back, the more leverage you loose.. if you're loosing leverage, then all you accomplish is making your hands work more, and many times it'll take two cuts with the NWS, that the Knipex or Klein will do in one.. also consider this, comfortably, the handles of any of these will be open about half way or so, so translate that into half the jaw opening shown here.. that really starts to put things into prospective.
I own almost every major pair of diagonals (except the snap ons) cause I got tired of these threads with people swearing up and down which is better then what, but yet they only own one pair.. so I bought most of them to try for myself..
Here, Crescent pivot pro's (same as gearwrench) and the ****** horrible complete waste of money Dewalts added.. that's enough to get the point across.. and yes, both tips of the Dewalts are broken off.. I had the crescent compound cutters too, but gave them to the A/C repair guy if he let me throw his Dewalts in the garbage.