7.75" Milwaukee Combination Electricians 6-in-1 Wire Strippers Pliers Expired

Those are totally different tools. Klein is thin stamped sheet metal wire stripper, and Milwaukee are real pliers
Klein analog is this: https://www.homedepot.com/p/Klein.../309328454

A few comments mention that the cutting blades are surprisingly soft, just FYI. Good deal for the price and something the lifetime warranty should cover, but these are made in Taiwan/China and not U.S.A. like the Kleins.

I have both of the Klein Tools automatic strippers 11061 and 11063W so I'll give a quick comparison. I'm not sure if Klein Tools made the original version of either or both of these tools or not, but all of the various name brand and no-name automatic strippers in this thread are variations on these two designs.


11063W Katapult (left) and 11061 (right)


They operate using fundamentally different mechanisms.

The $20 Klein Tools 11061 [amazon.com] has two opposing sets of hard plastic serrated jaws that grip the wire to be stripped. You insert the wire from the left. By half-closing the handles, the jaws clamp shut on the wire, automatically adjust so that the left set grips down hard enough to hold both the insulation sheath and the underlying conductor in place, while the right side only grips hard enough to grip the insulation. When you fully close the handles, left jaws hold the wire in place, while the right set of jaws pulls to the right, stretching and tearing the insulation from the underlying conductor.



In theory, this tool is awesome, because it is truly automatic. But in practice, it doesn't work very well, to the point I rarely use it anymore. There is a set-wheel to adjust the tension that is very finicky, and it doesn't produce consistent length strips. It sometimes just tears the whole wire apart, and there are plenty applications where you are modifying something and don't have enough extra wire to afford multiple cuts and strips. But worst of all, it sometimes grips a little too hard on the right and pulls both the insulation and the conductor, deforming the conductor, before the insulation is stripped away. If you weren't paying close attention you might not notice when you damage the conductor, which could be dangerous.
Also, the cutting blade in between the handles is poor quality, soft and totally deformed after not much use.

The $30 model you link is the Klein Tools 11063W [amazon.com] "Katapult" and I love them.

They have a single set of gripping jaws on the left that hold the wire in place. On the right, there is a series of cutting blades akin to a standard wire-stripper sized from 8-22AWG. You line the wire up in the appropriate position based on the gauge of your conductor, and gripping the handles closes the jaws and blade down on the wire and draws the blade to the right, cleanly cutting the insulation sheath off.



It does take a bit more attention than the other style, because you have to visually line the wire you're stripping up with the appropriate notch in the cutting blade, but it is very consistent in stripping exactly the length of insulation you intend, because the cut always happens exactly where you set the wire on the blade. Unlike the other one though, you do need to know the gauge of whatever you are stripping. They are great for stripping Romex. The cutting hole between the handles is sharp and stays sharp. It's a bit annoying that they can't really be stored in a closed position in my tool bag, but otherwise no complaints.