An automatic tire killer is a security device designed to puncture the tires of vehicles that attempt to enter restricted areas. It typically consists of a series of sharp spikes that are deployed when unauthorized access is detected.

When a vehicle approaches, the spikes remain retracted to allow entry. If an unauthorized vehicle tries to pass, the spikes rise and puncture the tires, effectively immobilizing the vehicle. This device is commonly used in high-security locations such as military bases, airports, and secure government facilities.

Automatic tire killers can be integrated with surveillance systems and access control mechanisms for enhanced security. They are designed for durability and effectiveness, providing a reliable deterrent against unauthorized access.