Best suited for your Baratza Virtuoso, Maestro or Maestro Plus grinders, the Baratza Portaholder is designed to give your hands a little break while grinding beans. By using this handy device, you need not to stand and hold a portafilter in place throughout the grinding process. Simply insert the Portaholder into the grounds bin slot, insert a portafilter and set the grind time. You have time to step away as the portaholder will hold the portafilter for you. It is compatible with any commercial or domestic portafilter and clean up is also extremely simple and user friendly.