Output: DIN 3120, ISO 1174, Form A 6.3 + A 10. Drive: DIN 3126, ISO 1173, Form C 6.3. Application: For security screws - Snake Eye. Bits: Reduced, over-turned profile. Material: High-quality chrome-vanadium steel, hardened throughout. For universal applications DIN 3126, ISO 1173, Form C6.3.