This is a Dresser / Bagger complete drop kit with shocks and drop shackles. This is specially for all the New Dressers that have the new HD Spring Shock. When installing just the drop kit, the original HD Shocks will not work. So that is why we have put together this kit. The drop shackles in the kit, you can lower the bike from 1" to 3". Please have a certified mechanic install this kit. When lowering a bike you have to make sure you have cleared or have clearance on all moving parts on the bike.