A properly installed Tune-o-matic bridge post extends 1/2" above the top of the guitar, with the other half of the inch-long post screwed into the body. Thread the tool onto the post until it is flush against the thumbwheel.
How high should bridge be on Les Paul?
Pickup height setting is a little tricky but not a black art. Fender-y single coils have a stronger magnetic pull so need to be backed off, but most humbuckers share one bar magnet and aren't so strong. So, set the bridge to about 3.5mm and see how it sounds.
How do you adjust the height of a guitar bridge?
To adjust the action height on this type of bridge, you need to use a 1.5mm Allen wrench to adjust the two screws on each saddle. Make sure you adjust both height screws to the same height so your saddle stays flat. With this type of bridge, you need to go through each string and check the action height for each one.