24-Hour Door Guardian: This universal butterfly spring door closer helps doors close automatically, preventing them from being left open by family members or pets. It assists in maintaining indoor temperature by reducing the loss of heated or cooled air, offering added convenience in daily use. Wide Range of Applications: With an internal diameter of 0.75 inches, this spring hinge door closer fits most standard door butt hinge pins. It is compatible with various interior and exterior doors, including bathroom, kitchen, study, and screen doors. No-Drill Installation: Install the self-closing spring door closer without drilling. Simply close the door, remove the hinge pin, insert the door closer into the hinge, and allow it to expand. This hole-free installation is quick and easy. Due to spring tension, wearing gloves during installation is recommended. Durable Steel with Rubber-Wrapped Design: Made from stainless steel with a chrome finish, this hinge pin door closer is designed for long-lasting use. The ends are coated with durable rubber to help protect the door and frame from scratches. Color: Silver Material: Stainless Steel Package Contents: 8 x Butterfly Spring Door Closer Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.