1. Housing: Material AISISAE 1045/DIN C45/ASTM A194-2H.
Hardness reaches to HB179 - 217 after Quenching and High Temperature Tempering.
2. Ball Stud: Material AISISAE 5140/DIN 41Cr4.
Overall Quenched and tempered, polishing again after overall high frequency quenching treatment.
Hardness of Spherical Surface: HRC56 - 63.