the blade in question: https://www.amazon.com/TACRAY-Foldable-Stainless-Anti-skidding-Ergonomic/dp/B0CHDRWBRB/
they make a 4.4" version, which is STILL illegal to carry outside of a bag in NYC and a lot of US states. https://www.amazon.com/TACRAY-Foldable-Stainless-Anti-skidding-Ergonomic/dp/B0CHDRWBRB but longer blades are allowed in especially hunting states. Check your state laws, don't get fucked.
brandishing these things in public around law enforcement will absolutely get you into Hot Water at best (NYC turbo felony) in most US States. Getting frisked for other reasons and having them find it, too.
DO NOT BRING THESE THROUGH NYC OUTSIDE OF A BAG.