These cutting plastics are used with Mini, Small, Large, Long Cut, Extra Long Cut, Jumbo and Super Jumbo Studio dies. The Studio Fabric Cutter uses the cutting plastic between the material to be cut and the steel roller. Be sure to use the appropriate size of cutting plastic to match die board size. To extend the life of the cutting plastic, use both sides of plastic. Specially-formulated cutting plastic is part of the precision system that makes AccuQuilt Studio cutters and dies so efficient.