An oxygen lance is a tool that is used to cut through metal with high-pressure oxygen. Some common uses for an oxygen lance include:

1. Cutting through thick steel plates in shipbuilding and construction.
2. Removing welding slag and other impurities from metal surfaces.
3. Cutting through metal pipes and other structures in demolition and salvage operations.
4. Burning out unwanted material, such as resin or wax, from casting molds in foundries.
5. Removing rust and scale from metal surfaces.
6. Cutting through metal in emergency rescue operations.
7. Creating holes in metal for plumbing or electrical installations.