thang010146 | Fixing a base on the floor 1 @thang010146 | Uploaded 8 months ago | Updated 2 days ago
Place the base into the floor hole, turn the screw to secure the base to the floor.
Thanks to the oblique surfaces, the blue upper piece and the yellow lower piece are pushed toward wall of the hole in opposite directions. Friction will keep the base firmly on the floor.
Four threaded holes on the base surface are used to fix other devices.
This design is found on bicycle handlebar stems
youtu.be/pe3wTSXQa2c