Trygg regular truck chains, also available in square chain. 50 years of proven reliability in the oil patch and forests of North America and more than 75 years in Europe. Available for single or dual wheel. 2 or 4 links spacing in chain diameter 5mm, 5.5mm, 6mm, 7mm, 8mm or 9.5mm to fit tire dimension. Assemble in Quebec by experienced workers. When the going gets tough the tough get going with Trygg ! Often imitated, never duplicated!