Recaro s Locking Sliders are made of high quality materials, they offer strength and piece of mind for anyone putting an aftermarket seat in their vehicle. The mechanism is actuated by a steel bar between the two seat rails. This bar is attached directly to the release mechanism, which yields a direct feel on the seat release. No more mushy cable releases. Features: Bar mounting location on the Outside of the sliders. Made of Steel Easy Adjustments Great For Multi Driver Races