This high quality router mount is perfect for any CNC Machine. It has a 71.0mm inner radius which perfectly fits a Bosch Colt router, however with a 3D Printed Shim, or other means it can easily work with any other router/spindle. It can be mounted in a number of ways to 20x60mm or 20x80mm V-Slot extrusion, with either through bolts or corner brackets.