The best way to secure your vehicles and the cargo in them is to keep them from being taken or tampered with in the first place. CSA offers a variety of truck, trailer and dolly locks designed to protect your valuable transportation assets when they are unattended and most vulnerable. The TS-4A truck and TS-3A trailer locks provide the highest possible level of security by disabling the air brakes. Permanently installed on a vehicle, they are easily applied in seconds by simply taking out the key, locking down the brakes and rendering them immovable. Alternatively, removeable glad hand locks can be applied to trailers; king pin and landing gear locks provide an added layer of security for parked trailers. Dolly locks prevent unauthorized movement.