A similar system is still in use today. Recently, burning bars have been developed for use by law enforcement officers and firefighters to allow forcible entry into buildings. These bars are composed of tubes made from plastic impregnated with iron powder. Both the iron and the plastic burn in the oxygen and no torch is required for ignition. The temperature produced is sufficient to melt steel and other metals, but not concrete.
Many people are unaware of the danger of oxygen under pressure.
Any combustible material ignited in a jet of oxygen will burn ferociously, even the human body. So be very careful and never use oxygen as a substitute for compressed air.