For a strong and resilient security screen door, both the Sentry and Gibraltar doors are constructed of extreme-duty, decorative 1/4” aluminum, diamond patterned, security grill material that is secured into a powder coated frame. The door frame is made from a 7/8” x 2-7/8” .60 extruded aluminum frame with double strengthened extruded corners to provide maximum durability and security. The style of the pattern is different between the two to give you options to compliment the exterior decor of your home.