The Baratza Maestro PortaHolder gives your arm a little rest when making espresso by eliminating the need 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’re then free to step away as the portaholder holds the portafilter for you. Suitable for the Baratza Maestro, Maestro Plus or Virtuoso Grinders,the PortaHolder™ is easily adjusted to fit any home or commercial portafilter. And clean up is a snap.