You will need at least 1 piece of everything and 2 regular black screws to make it work. Designed for black screws but I guess it will be fine with any others. Works best with 2 or 4 springs made of something flexible like PETG. Just screw/glue it to anything and assemble as shown in pictures.

I made it to measure a directional pattern easier, but there is probably more use to it.