Amazon KitchenAid Gourmet Multi Sided Meat Tenderizer for Pounding Meats, Nuts, Shellfish, Hang Hole for Easy Storage, Hand Wash, (Some People Throw it in the Dishwasher for Good Results), One Size, Black 50% Off $8.99 ExpUnk

[Marvomatic]

https://www.amazon.com/gp/product/B07Q2WVG1Z?tag=phtwllt-20
Have one of these I bought year ago, and it works great!