Socket clevies is forgeable iron,hot galvanizing.Spring catch bronze or stainless steel.

碗头挂板为可锻铸铁件，热。簧销为青件或不锈件。

For processing the high tensile metals:carbon stell common alloy stell,hard bronze forgeable castiron.etc.

工高抗张强度的金属:碳素、硬青和可锻铸铁等。