PROTOCONCEPT's heads are forged by a forging company in Japan.
While typical forging can lead to variations due to polishing, PROTOCONCEPT employs the world's top-notch precision forging technique, capable of manufacturing high-precision parts like automotive components.
Leveraging the expertise of a company known for its precision manufacturing, they forge highly precise heads that are nearly perfect.
This approach results in minimal individual differences and the creation of high-quality heads.