Automatic Adjustable Door Closer Aluminum Alloy Door Closer, Self-Closing, Hidden Mount, Heavy-Duty Power Spring Door Closer Multifunctional Automatic Door Closer Automatically closes doors. Suitable for home, office, shed, garden, garage, and similar applications. Auto Door Closing Features a power spring mechanism with strong spring force for broad application compatibility. Quiet & Smooth Operation Equipped with nylon rollers to prevent door surface damage; ensures soft, silent, and smooth door operation. Adjustable Closing Strength Adjustable closing force using a hexagonal screwdriver—compatible with both left- and right-swinging doors. Includes all necessary mounting hardware for easy, labor-saving installation. Specifications: Material: Aluminum Alloy Dimensions: 12.6 cm x 2.6 cm x 15.5 cm (4.96 in x 1.02 in x 6.10 in) Package Includes: 1 Set Automatic Door Closer Note: Please allow for slight measurement variations of 1–2 cm (0.39–0.79 in) due to manual measurement.