If you like to smoke joints then you need a good rolling tray. Rolling on a book or a table gets messy and you can roll up stuff you don't want to be smoking on accident. The MOBO (Mother Board) modular rolling tray system allows you to mix and match parts to customize your tray setup however you'd like.
Sometimes one rolling area is not enough for those big projects. The sidecar is an expanded rolling chamber for rolling king sized doobies or breaking up trees.