A custom designed mount which allows you to attach your Knog Blinder to the back of a Topeak bike rack (May fit other racks as well?) You can use the two extra screws that come with the Topeak rack to fix the custom mount in place, and then simply strap the Blinder in place. You will need two additional nuts though! The mount can be mounted as shown in the picture OR fipped to the INSIDE of the bike rack, which makes the Knog Blinder only stick out a few millimeters out of the back.Make sure to print this part so the mounting plate is facing the build platform for extra strength.