These switch plates are used in Chapter 2 of the "Upgrading the KRmf70 CNC" book. The book gives you details on how to make these, so these are provided for those who want to fast track this upgrade.
Note that the "Upgrading the KRmf70 CNC" book is required to install these.
You can order these with or with out the power switch mounting hole on the right plate. This option is for those that want to start with a blank for the right hand plate.