EASY PUCK REMOVAL: Tap your portafilter against the knock bar for quick, mess-free disposal of coffee grounds. SANITARY SURFACE: Provides a sanitary surface for knocking coffee grounds separate from a waste bin. PUCK STORAGE: Fits up to 10 double shot pucks. EASY TO CLEAN: Knock bar is removable for easy cleaning. PREMIUM FINISH: Elegant stainless steel finish. WHAT'S INCLUDED: Knock Box with removable knock bar.