The steering wheel cover is made of red, sturdy canvas. The cover can be locked either with a lock or Velcro tape. The transparent outer compartment is intended for an information sign (210 x 149 mm/DIN A5 format). It is used for marking to ensure that no unauthorised person can operate the vehicle while repair or maintenance work is being carried out. It can also be used to indicate that the vehicle has been released. For steering wheels up to 43 cm diameter.