The Tyre Killer and the modular Tyre Killer SHARK offer a high degree of protection against unauthorised entry or exit of hostile motor vehicles. If a vehicle attempts to break through, its tyres and/or axles will be destroyed depending on the model. Further progress will certainly be prevented. Perimeter Protection Groups’ Tyre Killers can be used individually or in combination with other products to form a sluice for vehicles. The solid sharp spikes are clearly visible thanks to garish warning colours thus ensuring the stopping of approaching vehicles in good time.