Yes that's correct and i will be attaching a 24" display and a 22" display, the manuals don't mention anything about it which is strange!To attach the display to the arm?
They'll be a small metric of some sort. Did you check the manual? The size may even be moulded into the plastic.
What display is it?
Going to buy a dual monitor bracket but i'm struggling to find out what screws use, is there a common screw to use when doing this?
Awesome, Thanks for your help!Probably M4 X 10mm if it's vesa mount
Some info here https://www.ergotron.com/en-us/support/vesa-standard