Also, I bought a Jaccard years ago and am glad that I did. Many of the finest steakhouses use them to loosen up steaks. Great for tenderizing duck, goose, and venison. Also allows the marinade to get into the meat better. If I had to replace mine, I'd certainly buy the one with multiple rows of tines to save my arm some work.
https://www.youtube.com/watch?v=oGGdNK5smqY
https://www.amazon.ca/Jaccard-45-Kni.../dp/B000A3I3G0