ACI Modern Heroes Heads are manufactured products which best fit for Dragon bodies. It can also be applied to DID 's bodies as well but there will be tiny gap in between the neck and head. But it's still a good applicable new items for the collectors who been looking for higher grade of headsculpts. It's easier to use them , just blow them with hot air with hair-drier, or put them into hot water to make the head (s) softened. Then, you can plug them easily to the Dragon bodies to make your own custom 1/6 figures!