Since this was made from found materials this part might not be very helpful to most. I used a scrap piece of 1/2" black "StarBoard
" and the temporary license plate tag that came with my bike. You can substitute with whatever suitable materials you find.
-Square & Ruler
-Drill w/ 3/16' Drill Bit
-1/4-20 Tap w/ Tap Handle
-Coarse file & Sand Paper
-Saw (power or hand is your choice, I used both)