Never swap cartridges again! You can keep everything you need at your fingertips with Cricut Jukebox™. The core unit holds up to six cartridges that connect to any Cricut® machine, enabling users to swap cartridges with a push of button.  Store up to six handbooks and overlays in the base unit for a complete, simple system. Link up to three core units at a time to use as many as eighteen cartridges with ease.