This double basket is comparable to a VST in both accuracy of hole size as well as shape and tamper sizing. It is more demanding of perfect distribution and a great grinder, but the payout is worth the effort. If you get even extractions, flavor profile is more focused. It isn’t a silver bullet for every coffee, but very useful to have in your toolbox.
58.5mm suggested tamper size.
It’s made by Decent Espresso and more info can be found here on their site: http://decentespresso.com/basket