How to dimension slot from the outermost points of arcs in Fusion 360

Aluminum T-slot profiles are a modular framing solution for your 8020 project Dimensions 1 x 5 ; 1 x 1 ; 1 x 2 ; 1 x 3

Example The slot and the mating parts have basic dimensions of inches Lower and upper limits of the slot are and inches, correspondingly;

dimension slot slot supposed to be when indicated as 3 As I read his question, he is asking for the overall length of the 3 dimension, meaning, is that

dimension a slot The dimensions of the entire cylindrical slot are: = inches, = inches and length = inches