Tipped Most of Diamond(PCD) cutters for heat transfer are shaper cutter having complicated shapes. So, the precise shapes of the cutters is most imprtant. Because the inner wood usually MDF and it is covered by tapes. If the sapes of the cutter is not correct in shapes, the tapes will not be attached tightly. Kumha makes the drawings with AUTO CAD and making the cutters by German Vollmer mahichine which are used exclusively for this cutters. You can see this product with 3 D by clicking above picture.