What is a hard biscuit made of wheat flour?

There are several hard biscuits made of wheat flour. To give you a more specific answer, I need more information. Could you tell me:

* What country or region are you thinking of? Different places have different traditional hard biscuits.

* What is the texture of the biscuit you're thinking of? Is it crumbly, dense, or something else?

* What are some other characteristics of the biscuit? Does it have a specific shape, flavor, or purpose?

Once I have more information, I can help you identify the specific type of hard biscuit you're looking for.