Answer:
Long and thin red within with a nail at the end.
I am gold and can be black and white I'm a symbol for a nation when freedom took flight.
You use me between your head and your toes the more I work the thinner I grow.
Sometimes I fly as fast as the speed of light. Sometime I crawl as slow as a snail. Unknown until I am measured but you will certainly miss me when Iām gone.
I contain five little items of an everyday sort. You can find all five in a tennis court.
What sphinxes employ and players enjoy.