These are calibrated tools, one would need a 5, 6 & an 8nm for your fittings w/the appropriate hex fittings for each bolt size.
I have three Ritchey tools for my requirements in the tool box, still a bit less $ than a Park torque wrench and I like the feel of the Ritchey tool.

Do NOT loosen any fitting w/ the R-tool or under-torque and guess.
We are a far cry from the old "just lean on it" ham-fisted days.....but we don't have 3 gears or a 32lb bike either......(well, I do).....

-Bandera