This is a 3D printed adapter to support Flex Track at 90 degrees to a surface.
Originally designed to aid mounting lengths of Flex Track to wooden boards for a science demonstration.

Requires 2 x M3 screws, washers and nuts per bracket. The low profile head screws are much better.
The design uses a 10mm diameter plug to locate into the wooden frame with an optional hole to allow an additional securing screw.
The design file is in OpenSCAD and can easily be changed.