24-Hour Door Guardian: This universal butterfly spring door closer helps doors close automatically, addressing the issue of doors being left open by family members or pets moving in and out. It also helps retain indoor temperature by preventing unwanted airflow, adding convenience to daily life.Wide Range of Applications: Designed with an internal diameter of 0.75 inches, this spring hinge door closer fits most standard door butt hinge pins. It is suitable for various types of interior and exterior doors, including bathroom, kitchen, study, and screen doors.No-Drill Installation: Install this self-closing spring door closer without drilling. Simply close the door, remove the hinge pin, insert the door closer, and allow it to expand into place. This hole-free installation is quick and easy. Due to the spring tension, it is recommended to wear gloves during setup.Steel with Rubber-Wrapped Design: Constructed from stainless steel with a chrome finish for durability and corrosion resistance. Each end is coated with durable rubber to protect the door and frame from scratches and marks.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 in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm.