Get down to brass tacks essentially means get down to business, but there is some debate about where the saying came from.
Brass Tacks - Life Or Death
Why Do We Want to 'Get Down to Brass Tacks'?
What is the origin of the phrase 'getting down to brass tacks'? What exactly is the phrase meant to convey? - Quora
A thread about the phrase “let's get down to brass tacks.” : r/MurderedByWords
A thread about the phrase “let's get down to brass tacks.” : r/MurderedByWords
Brass Tacks. “The two most important days in your…, by Shane Misty
The saying 'Get down to brass tacks' - meaning and origin.
This Is Why People Say Brass Tacks — Best Life
What is the origin of the phrase 'getting down to brass tacks'? What exactly is the phrase meant to convey? - Quora
The Brass Tacks – What Is The Reason (1967, Vinyl) - Discogs
Brass Tacks - Life Or Death
Brass Tacks Hard Facts Tee – Elkhart Brass
This Is Why People Say Brass Tacks — Best Life
What is the origin of the phrase 'getting down to brass tacks'? What exactly is the phrase meant to convey? - Quora