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Minimalist adapter to use most adjustable electric drivers to grind your coffee. This has been tested to work on the Porlex and the Hario Ceramic Slim. While one end fits onto the pena-nut of the Hario/Porlex, the other end is a ¼" hex that should work with almost all adjustable electric drivers and ¼" socket adapters. This is a work in development as I am making a proper USB powered grinder for my Porlex and Hario mini, which is why it is in beta. I cannot guarantee that it will fit every Porlex (as I only have 3 to develop the product with), so please let me know if there are any issues. We have also noted that the shipping from Shapeways can be a little costly. Email us at firstname.lastname@example.org if you would like us to ship one to you at a much reduced rate. We are at http://www.facebook.com/porlexadapter