[ Ref. Gordon Ramsey in 170224 MMDigest ]

You could use something like a hollow punch set that punches both
at the same time:

  http://mayhew.com/product/model-66016-36-pc-hollow-punch-st-jlb260mt/ 
  http://mayhew.com/product/model-66002-27-pc-hollow-punch-set-350us/ 

and punch on a suitable surface such as

  http://www.csosborne.com/no_603_cutting_pad.html 

Good luck,

Wm. Grant Chapman
West Point, NY