The Planted 90 Degree Steel Side mount bracket is constructed from 1/4 inch thick aluminum, complying with the FIA's required side-mount thickness. 90 Degree are ideal for when the width of the sliders is narrower then the width of the seat, allowing the sliders to sit under the seat. The universal design fits competition, side-mounting seats from Sparco, Recaro, Racetech, OMP Cobra, Status, Bride, and probably many more! Meant for installation to aftermarket sliders, these side-mounts also offer multiple slots for direct mounting to the car.