WeWentSimRacing 
Trak Racer Trak Racer Universal Seat Brackets for Recline Seats and Office Chairs
by Trak Racer
Universal seat brackets for recline seats and office chairs. High-quality steel construction. Compatible with Trak Racer and other rigs. Adjustable mounting points for various GT-style seats. Fits most seats, including some office chairs. Patent-pending design.