A hinge acts like a bridge between the door and the door frame. It holds the door firmly to the frame and prevents it from coming out. Our Weld on Winged Hinge feature open wings and ball bearing washer. Available in 3-1/2″and 7″sizes and both sizes have a 3/4″pin. Also we have the most popular sizes of male and female bat wing hinges for your heavy duty applications. Winged hinges are ideal for gates that should only open up to 90 degrees. Want to keep a door or gate from banging into something? The winged hinge is what you need. Learn great tips for how to use and install these hinges from RF Industrial Hardware.