A. The modal verbs are can, could, may, might, shall, should, will and would.
a. The modals are used to show that we believe something is certain, probable or possible, talking about ability, asking permission making requests, and so on.
Idiom 365
Get Down to Brass Tacks: to talk or deal about the most important or serious issue
Example: Let's get down to brass tacks, who's going to have the responsibility of this work?