Hardware Essentials Adjustable Spring Hinges are perfect for residential and commercial applications when self closing doors are required. Feature fully adjustable springs for different closing speeds. Safe working load of 65lbs for one hinge, 85lbs for two, 110lbs for three. Features. 1/4 inch round corner spring hinge, Adjustable. Satin Brass finish.. Satin Brass finishSpecifications. Finish Satin Brass. Size 4. Country of Origin Taiwan. Weight 0.85 lbs