Hand made coffee tamper using a Dura-Ace WH-7850 front hubshell.
 
Base and top insert are manually machined in-house from catering grade stainless steel, base is currently at 58mm diameter to fit portafilters found on most commercial espresso machines and a lot of home ones too.
 
Base can easliy be resized to suit any other portafilter sizes at no additional cost.