Output: DIN 3120, ISO 1174, Form A 6.3 + A 10. Drive: DIN 3126, ISO 1173, Form C 6.3. Application: For Tri-Wing® security screws. Bits: Reduced, over-twisted profile. Geometry: Torsion zone to protect against premature breakage of the bit under load. Material: High-quality chrome-vanadium steel, hardened throughout, tough. For screw connections in hard materials DIN 3126, ISO 1173, Form C6.3.
