This Austyle Fly Screen Door Knob by Superior Brass is a beautiful and functional addition to any home. It is made of solid brass and features a classic design. The 30mm projection ensures it is easy to grab and turn. The knob is available in a variety of finishes to match your existing hardware. Please note: These fly screen door handles are suitable for single doors as well as double doors when used in conjunction with a box keeper. A box keep may also be required for installation on some single doors. Update your door handles with quality screen door handles from Superior Brass.