The Channellock is the pick for best overall. At $27 and forged from US steel,
it needed the least force of any pair in all three cutting rounds — 25 lb on
14-gauge copper wire, 66 lb on a 16-penny nail and 104 lb on a number 10 deck
screw — and it held 9 in-lb on a socket extension and 15 in-lb on a roofing
screw with only very minor tooth wear. The Knipex is within a few pounds
everywhere it counts, at 69 lb on the nail and 108 lb on the deck screw, and
the two are close enough that either is a defensible buy at $27 or $42.
For less money, the $22 Gearwrench matches the Channellock's 5.7 mm leverage
profile and nearly matches its numbers: 26 lb on copper wire, 77 lb on the nail
and 116 lb on the deck screw, plus 827 lb before it broke. The $18 Doyle from
Harbor Freight is the other bargain, tying for the strongest crosshatch grip at
10 in-lb, cutting copper wire at 30 lb and the deck screw at 120 lb, and
finishing with less knife damage than the Gearwrench. Both cost a fraction of
the premium pairs and give up very little.
Grip and cutting force pull in opposite directions here, so buy for the work.
The Japanese pairs — the 349 g Vampliers and the 353 g Fujiya Tools — grip two
to three times harder than anything with crosshatch jaws, at 24 and 29 in-lb on
a socket extension, but their shorter handles cost real effort on every cut,
and the Fujiya Tools costs $74. Toughness is a third axis again: the Vampliers
survived to 851 lb and the Irwin to 845 lb, while the Channellock and Fujiya
Tools broke first at 395 lb and 368 lb, a direct consequence of putting the
rivet close to the cutters. The one pair to be wary of is the $13 Typhon East,
which needed 71 lb on copper wire and 161 lb on a nail, and whose handles bent
on the deck screw while its cutting knives were destroyed.