Back height adjustment, chair height adjustment, arm rest height adjustment, back inclination adjustment, loose rocking adjustment(or locked) and of course rolling casters

The adjustments are ROCK solid and lock in place

The adjustments work well but they're not relevant to the problem.

The adjustments are easy to use.

Purchased this chair AFTER test driving at local Office Max to ensure ergonomics fits me, and I have to say, this chair is super comfortable with just enough adjustments for my lumbar, tilt, seat height, and arm rest height.