Existing techniques to manufacture conventional tool steel inserts for the plastic injection moulding process are expensive and time-consuming. Complex mould inserts. difficult to manufacture with conventional processes. can be produced using Direct Metal Laser Sintering (DMLS) with Maraging tool steel (MS1). https://www.roneverhart.com/San-Diego-Padres-Indigo-Graphite-Collection-1998-World-Series-Fitted-Hat/