This is probably the BEST Solid Brass Spring Screen/Storm Door Hinge you can find in the market. Manufactured to strict tolerances and engineering standards, this surface mount hinge is strong and durable. The exposed spring and ball tips provide a decorative look to your high value screen or storm door. The spring is made of Stainless Steel and plated with a matching finish. The spring is strong enough to handle most standard weight screen and storm doors. This product is sold by the pair.