About this item Good Design: this is a coffee pucks container design with portafilter tamper stand , the tamping station is hanging over the waste tray, the coffee powder spilled from the portafilter during preparation drop down to the waste tray directly, less cleaning work compare with other designs.Heavy duty and stury material , removable knock bar design ,Solid construction, two part design allows the tub to be removed for cleaning, base/shell has non-slip feet to keep in place The Idea Of Knock Box Is Simple: It is a nice container that has a bar across the middle. You simply bang the used portafilter on the bar preventing the filter from popping out and let the coffee grind cake fall into the container. Our DIBTSA knock box is perfect for this. It is about 7.44 by 5.43 by 3.07 inches in size. It holds a lot of coffee grinds, at least 20 brews. The bar has a rubber surround which makes for a soft hit as opposed to metal on metal, reduce noise and protect your portafilter Multiple Function Purpose Saves Space: This knock box is an excellent accessory for any espresso setup. Its multiple function purpose saves space so you do not need a separate tampering station. As a nice perk that DIBTSA included on their knock box is a portafilter support notch. This notch allows for you to support the portafilter when tampering. Good for any espresso home or comercial grade setup Easy To Clean: Clean up is simple as you just take the bar off, since it in the sink and dump the coffee in the garbage. A paper towel might necessary to wipe out any remaining coffee grinds at the bottom Package Includes: one wooden base box, one black knock box and one rubber knock bar