This hold down bracket is used on Shangrila sheer shades that are manufactured by Comfortex, 3 Day Blinds, and Blinds Galore. It has an integrated pin that fits into a hole in the bottom rail of the shade.
Clear plastic. Uses size #6 mounting screws that are sold separately.
The diameter of the pin is 3/32″.
Sold individually.
Comfortex part # CS5042.