Lynnmor is correct.
Here are the installation instructions from the DrawTite hitch manufacturer. The other manufacturers have the same instructions.
Sway bar installation install and adjustment.Notice that statement 3 in the beginning states:
"3. The handle (5) is an on/off device. The bolt (7) below is for adjustment only."Notice that in the "Hook Up" section "b" it states:
b. "Retighten handle until it stops (handle should be in its original level position)."This means tighten the handle all the way and then back it off to a position parallel to the trailers A frame.
Then is section 3 "Adjustment" it states:
"To get maximum benefits from the sway control assembly, a series of road tests should be taken with
the loaded trailer. On subsequent trips increase or decrease tension by turning the adjusting bolt (7) in 1/4 turn increments in
the direction shown on the label until the desired control is achieved. For large trailers, it may be necessary to install a second
sway control unit."This adjustment is done by turning the small bolt located below the handle in small amounts and road testing in between adjustments. By large trailers they are talking about those longer than 26 feet according to other manufacturers instructions.
The thing to remember is that the long handle is an "On/Off" device and not an adjustment device. By doing it the proper way, you will always be able to put the same amount of sway control on and not be guessing whether you turned the handle hard enough.
Hope this helps.:)
Barney