The Door Bull helps your door frame do its job by distributing the force more evenly, and at the appropriate angles to handle the blows of an attempted home invasion. Even with key bumping, the Door Bull prevents the door from opening, keeping you safe inside.

• Patented design: designed by police officers
• Strong: superior-grade, aluminum construction.
• Effective: it spreads the force across more of your door frame.
• Handy:store the Door Bull on the included hanger, or completely out of sight.
• DIY installation:easy installation on most doors.