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Material selection and special forging process guarantee optimal functioning and long life. “Blind” interlocking possible due to bevelled edges on male and female coupling.
Standard:
DIN 3123-C 12.5 External square drive to DIN 3120-A 12.5 with sprung ball, internal square drive to DIN 3120-C 12.5 with grooves.
Material:
Chrome alloy steel, non-flaking, chrome-plated over nickel.