In 1968 the first "Petzl" products were sold. Rope clamps and descenders allowed ropes to permanently replace ladders. This new type of "single rope" technique revolutionised caving. Five years later, in 1973, Petzl developed his first mountaineering headlamp. Then in 1977 Petzl created its first vertical safety harness. The early 1980's saw Petzl expand its range of products from caving to vertical sports such as rock climbing and mountaineering, as well as rescue and working at height. Today Petzl are still a leader in verticality sports, working at height, rescue and headtorch products.