Salvo Chock is a device designed to immobilise nonarticulated goods vehicles whilst they are being loaded and unloaded. When used in conjunction with other Salvo products, it can prevent inadvertent or unauthorised drive-aways. It is designed to be deployed on the drivers side front wheel of the vehicle. Salvo Chock introduces discipline into the chocking procedure by interlocking the chock and the loading bay. If the chock is not correctly fitted, the bay door cannot be opened. Like all of the existing products in the Salvo range, Salvo Chock relies on Castell’s time-proven trapped-key technology.