Help - getting screen size via NSScreen

I’ve wandered into a territory I’m unfamiliar with, and I’m hoping someone can help me here. A part of the main script for moving and sizing windows on a second monitor, I want to use the following code:

tell application "Safari"
	set secondScreen to frame of item 2 of current application's NSScreen's screens()
end tell

What I get:

secondScreen : (NSConcreteValue) NSRect: {{2560, 360}, {1920, 1080}}

What I want:

secondScreen : {{2560, 360}, {1920, 1080}}

Can anyone help me?

Solved. Needed to specify as list

tell application "Safari"
	set secondScreen to frame of item 2 of current application's NSScreen's screens() as list
end tell