Which part of the knife is the scabbard?

This part is the sheath for storing the blade.

Protect the knife from external damage and make it easy to carry. The scabbard plays a role in protecting the blade, facilitating carrying and beautifying the appearance when using the knife. The sheath also prevents the knife from falling or being lost while carrying it. The sheath is an indispensable part of the knife. It not only protects the safety of the knife, but also provides convenience and safety to the user.