The technical reference standard for Professional chains is the Austrian Ö-Norm V5119, the only standard available for passenger vehicles with more than 9 seats or goods vehicles with a gross vehicle weight of more than 3.5t.
V5119 requires the product to be marked according to the standard to allow recognition during FDO checks.
Depending on the different models of König snow chains, the marking is present on different components:
- On Professional snow chains with external mounting (K-Summit Pro), the marking is stamped on the seat of the tensioning wheel;
- On Professional snow chains with intuitive fitting (Coach Master), the marking V5119 is stamped on the plate near the chain lock;
- On conventionally fitted Professional snow chains, the V5119 marking is stamped on the tensioning lever.