This is an extra strong thick steel base for holding your portafilter when you are tamping. And it's thickly padded with rubber to protect against scratches and dings. It's made to take lots of pressure. The semicircular cutout lets you place the portafilter onto the vise, with the spout inserted into the cutout so that it doesn't scratch the table or damage the spout. Once your portafilter is set, you can take your coffee tamper and tamp-away with full force. And you can tamp away with no damage to your portafilter or to your table.
In addition, on the top of this coffee tamper stand is a rubberized circular indentation (see inset photo) for holding your coffee tamper and for protecting your coffee tamper from damage when you're not using it. This coffee tamper station & base is a compound tool. It's both handsome, and it's very useful. This coffee tamper stand & base would make a great gift for any aspiring barista - including yourself.