The KM-VT600 series tyre killers from Kepler Machines are designed to provide unauthorised entry of vehicles, and can also be used for traffic control. The bidirectional action facilitates a single turnstile to act as entry and exit. They are manufactured from heavy guage steel and the robust spikes of the tyre killer punctures the tyres of the intruding vehicle. The turnstile can be regulated by any acces control mechanism, and can be used individually or combination with any other products.