High quality: 3-inch double-action spring hinges are made of steel with a satin nickel finish, which is rust-resistant and has good load-bearing capacity, making it durable for heavy loads Appropriate door thickness:Double spring door hinges are suitable for doors with a thickness of 3/4 inch to 1-3/8 inches and can accommodate doors weighing up to 30 pounds Double Action Hinges:The door hinge with double-action function,adjustable spring tension controls door forces and doors will swing both ways ,and you can adjust the hinge as needed to provide the desired closing speed for a variety of swing door applications Wide Application:The double action door hinges are widely used for freegate,saloon door,coffee shop door,pub door ,garden door ,swinging door, heavy traffic doors and etc After-sales Service：Customer service online real-time, through the station letter, mail and other channels to respond, quickly solve product after-sales problems, as far as possible to provide you with perfect after-sales service Attention: This spring door hinges (2 pcs) is designed for single doors. For double doors, please purchase two sets