Automatic Closing: Spring hinges are for doors that need to be kept closed for safety or security; enjoy energy savings by keeping warm air in and cold or moisture out Safety and Security: Self closing doors are required for fire safety and reduce entry opportunity for unexpected visitors Flexibility and Control: Use the provided allen wrench to easily adjust closing speed and force, and align the door precisely based on its size, weight or intended swing direction Exceptional Durability: Steel construction in forgiving satin finish helps your doors withstand continuous use Buy with Confidence: Customer satisfaction has been the priority for our Wisconsin-based company for more than 150 years; with our 1-year limited warranty, you can rest assured your purchase is risk-free