This is a chip mount you can bond to the inside of your case that allows you to secure the DNA40 by it's mounting rails with 4 - 1/4" thread forming screws. This has enough clearance to be used on the front or the back of the DNA40. This will allow for easy removal of the DNA40 if there is a problem or you want to move the chip to a different device.
You will need 4 of these screws available from McMaster-Carr. They are a T5 drive so make sure you have the appropriate Torx screwdriver!