Leveler cassettes are installed and removed from the leveler frame by a powered "Cassette Injector". The Injector table has the ability to store two cassettes and shifts from side to side to align cassettes for installation and removal from the leveler frame. The Cassette Injector is fitted with a powered "Cassette Opener" that grips the upper portion of the cassette and opens it like a "book" for convenient tabletop cleaning and servicing while the line is operating with the second Cassette. The ability to service leveler work rolls and back-ups outside of the leveler frame greatly simplifies leveler maintenance, and the ability to run the line while servicing the leveler rolls greatly improves productivity.