The Onspot Automatic Tire Chain System was invented in Sweden in 1977. Onspot of North America is the manufacturer of the Onspot Automatic Tire Chain System. The company’s manufacturing facility is located in North Vernon, Indiana. Sales and service support is provided through its Regional Managers located across the USA and Canada as well as a network of 1400 dealers. The system can be factory installed by over 200 OEMs on vehicles from ½ ton to Class 8 tractor trailers.