These are angle brackets for Fanatec CSL pedals that can be fixed to the floor. There are two versions to choose from, 15° and 20°, with the 15° variant being my preferred choice. The included disks can be printed and attached to the floor to provide a secure and stable base for the brackets. The angle brackets are then placed on the disks for a snug and secure fit. I personally have fixed them to the floor using double-sided tape, making them easy to remove at any time.