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 freely. It also helps maintain indoor temperature by preventing the loss of heated or cooled air, adding convenience to daily life.Wide Range of Applications: Featuring 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 the self-closing spring door closer without drilling. Simply close the door, remove the hinge pin, slide the door closer into the hinge, and allow it to expand. This hole-free installation is quick and easy. Due to the spring tension, wearing gloves during installation is recommended.Durable Steel with Rubber-Wrapped Design: Constructed from stainless steel with a chrome finish, this hinge pin door closer is built for durability. The ends are coated with tough 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 between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.