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Drive: DIN 3120, ISO 1174, style A 6.3 + A 10.
Drive: DIN 3126, ISO 1173, style C 6.3.
Application: For hand used nut driver sockets.
Bits: Reduced, over-tightened profile.
Standards: DIN 3121, ISO 1174, Style A6,3
For universal applications
DIN 3126, ISO 1173, Style C6,3