Vehicle anti-theft devices are security features designed to prevent the unauthorized use or theft of vehicles. These devices can include steering wheel locks, alarms, immobilizers, and GPS tracking systems. By making it more difficult for thieves to steal a vehicle, these devices help protect the owner's investment and reduce the risk of loss. Many modern vehicles come equipped with built-in anti-theft systems, while aftermarket options are also available for older models. Popular brands of anti-theft devices include LoJack, Viper, and The Club. Using these devices can significantly lower the chances of vehicle theft and may even reduce insurance premiums.