The successful construction of long span fixed partial dentures and implant prosthesis depends on the accurate fabrication of the removable die. The removable die technique requires an accurate reproduction of the prepared tooth, the supporting soft tissues, the adjacent and the opposing teeth. The die system captures this necessary information so that it can be transferred to the laboratory. So, here in this book there is a detail information about die and the die systems used for the laboratory procedures in fixed prosthodontics.