These appear to be heavy-duty stainless steel meat cleavers, commonly referred to as meat pangas or butcher knives.
Key Features
Blade Material: Polished stainless steel designed for rust resistance and easy sharpening.
Design: Wide chopping profile with a distinctive wavy or scalloped spine.
Handle: Black ergonomic handles secured with metal rivets for a sturdy grip.
Usage: Suitable for general butchery, slicing meat, and heavy kitchen chopping tasks.