Does a hitter use swivel in his stroke ?
Or is swivel only used by swingers ?
They both used hinge action but do they both use swivel ?
Also how does one stop uncocking the right wrist while uncocking the left wrist ?
The right wrist needs to stay bent while the left wrist uncocks....is this correct and how is it achieved ?
Both hitters and swingers have a finish swivel, regardless of hinge action.
The right wrist never cocks or uncocks; it should remain level throughout your stroke. The right wrist bend doesn't controll cocking/uncocking of the left wrist; that's the job of the folding/unfolding right arm.
The easiest way I know of to see this is without a club. Put your hands out in front of you like your gripping a club - flat, level left wrist, bent level right. Pull your left thumb out away from you w/ your right arm (extensor action). You should have a straight left arm and slightly bent right arm. now just fan and fold your right arm and as your right arm folds, your left wrist will cock.
There is some good stuff about these topics posted in the forum and in the archives (Maybe somebody could help me out with a link).