After @Pioneer's recent post looking for recommendations for spring hose clamp pliers, I decided to try what, judging by the price ($67.99, delivered), I figured must be the Cadillac option; the Knipex 85 51  180A (smaller of 2 sizes, 10" big brother are Knipex 85 51 250 A, both of which Knipex describes as  "Spring Hose Clamp Pliers")

tl;dr - They're okay I guess, but I think they're intended for single-wire spring hose clamps, not the double wire type that we typically see in appliances. 

Inlined here is a short video I made comparing their use on double-wire spring clamps against the venerable KP-2's I've also included a pic of the back of the retail packaging, showing images of 4 types of clamps that Knipex states they're intended for use on.

I'm still considering firing up the mini metal lathe and welder, making some higher-quality versions of the KP-2s using actual Vise-Grips.