Dips require parallel bars to be done correctly.
Starting position – Balance yourself up on a set of parallel bars with your arms straight and knees bent.
Movement – Bend your arms and lower yourself, leaning slightly forward, until your chest is at the same level as your hands. Then push yourself back up to the starting position.
Note – For many people this exercise gets to be a little easy so you can add weight using a special belt with weights hanging off of it.