The Brey Krause Model R-9020 Seat Back Brace is designed for use with non-reclining, racing seats, the Brey Krause adjustable competition seat back brace is engineered to extend the protection of your roll cage to the back of your seat. The Brey-Krause adjustable seat brace is designed to fit all styles of roll bar/cage tubing when used in conjunction with the Brey Krause back brace mounts (sold separately). Once bolted to the roll bar, the seat brace can be adjusted fore, aft, up or down.