Effortless Installation: Strong closing force keeps the door shut even in high winds. Attention to Detail: Fully adjustable self-closing feature, complete with mounting hardware. Hinge thickness: 2.3 mm; fits doors from 3.5 cm thick upward. Self-Closing Function: Spring-loaded hinges made of stainless steel automatically close the door if someone forgets to. Adjustable tension lets you set the door to shut fully or remain half-open as desired. Wide Application: Ideal for both exterior and interior doors—garage doors, front and back doors, bathroom doors, landlord access doors, and more. Important Note: After installation and testing, if you need to keep the door open for long-term ventilation, leave the tension at its lowest setting. Only increase the tension once ventilation is complete and normal use resumes; otherwise, prolonged high tension while the door is held open can damage the closer and reduce its closing force., Manufacturer: LuLobtg