1. Material: S2 alloy steel 2. Spinning head type: general purpose 3. System: metric 4. Blade specifications: 1/4inch, 6.35mm 5. Weight: about 8g/piece 6. Size: 21x12mm/piece 7. Scope of application: used to add magnets to the double-headed 6.35mm bit 8. Features: hardness HRC60, sturdy and durable, wide application range, strong magnetic force, adsorption of metal screws is not easy to fall, easy to use
