I saw these and thought they were kinda cool. They are basically ordinary lineman's-type pliers, but with replaceable hardened wire-cutting edges. Stamped NEVERSLIP NEW BRUNSWICK , N.J. and PATENTED
The cutting inserts slip into a tongue-and-groove pocket, and are held in place with a screw. I was able to track down the patent; No. 1,346,392 was awarded to a Mr. Richard Whitaker on July 13, 1920.
Apparently the "NEVERSLIP" name refers to the parent company, which had been in the horseshoe manufacturing business for many years, famous for their "Neverslip" line of horseshoe calks.
Conjecture on my part, but business must have been slowing down by the 1920's as automobiles took over the roadways from horses, so the company decided to put their forges to use making hand tools. Judging by the number of different advertisements I found on Google Books, they must have introduced their new pliers with quite the full 1920's version of a "media blitz."
Here's an ad from July 1922 Popular Science. There are several others.