24-Hour Door Guardian: This universal butterfly spring door closer helps doors close automatically, addressing issues of doors being left open by family members or pets moving in and out freely. It also assists in maintaining indoor temperature by preventing the loss of heated or cooled air, enhancing convenience. 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 and 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 in the door closer, and allow it to expand into place. This hole-free installation is quick and easy. For safety during setup, gloves are recommended due to the spring’s tension. Durable Steel with Rubber Ends: Constructed from stainless steel with a chrome finish, this hinge pin door closer offers durability and a clean appearance. Both ends are coated with rubber to help prevent damage or marks on the door surface. Color: Silver Material: Stainless Steel Package Contents: 8 x Butterfly Spring Door Closer Note: Light reflection and display settings may cause slight variations between the color shown in the image and the actual product. Measurement tolerances may vary by +/- 1-3 cm.