Features: 1.For Car Seat Angle Adjustment: The seat back hinge recliner is adjustable from 30 to 180, you can adjust the seat as you like, simple operation. 2.High Quality Material: Made of high?quality steel, durable and practical, the exterior is painted with black paint, corrosion?resistant and oxidation resistant for long lasting use. 3.Wide Application: This auto seat recliner with unlatch force of handle 34N?50N, perfectly fit for RV, caravan, and motorhomes use. 4.Package: Including 2pcs seat back hinge recliner for both left side use, reliable and strong products. Improve maneuverability and stability. 5.Great Replacement: The seat angle adjustment is a necessary part for you racing chair, helps improve driving comfort. Specification: Item Type: Seat Back Hinge Recliner_x005f_x000D_ Core Component: Fan-shaped toothed plate_x005f_x000D_ Adjustment Angle: 30-180 degrees_x005f_x000D_ Material: Steel_x005f_x000D_ Backrest Installation Size: Approx.90mm / 3.5in_x005f_x000D_ Seat Installation Size: Approx.100mm / 3.9in_x005f_x000D_ Adjustment Accuracy: 2.8_x005f_x000D_ Handle Adjustment Angle: 30_x005f_x000D_ Handle Unlocking Force: 34N-50N_x005f_x000D_ Suitable for seat left adjustment_x005f_x000D_ Uses: Trucks, engineering vehicles, modified car seats Note: Only for the left side of the seat.