Typically used on Fran Meyer, Jim Walters, Anjac doors, and a variety of other sliding patio door manufacturers Allows you to secure your sliding screen doors from accidental opening by pets or weather Stamped steel construction that is 13/32 inch wide and 1/4 inch hook projection All the necessary mounting hardware is included for a complete installation Please refer to the line art drawing and compare with your needs item before purchasing (Not Universal)