Abstract: A composite die retaining board and composite die are provided. The composite die retaining board includes a master die retaining board having a die rule insert-receiving recess, and a die rule insert installed in the die rule insert-receiving recess. The die rule insert has a shape that is complementary to the shape of the die rule insert-receiving recess. A plurality of interlock features extending from an outer periphery of the die rule insert and interlock with interlock bays formed and intersecting with the die rule insert-receiving recess. Methods of exchanging a die rule insert with a different die rule insert are also provided and enable a rapid swapping-out of different die rule inserts.