Meets your requirements: Robust and precisely fitting bits for general screw connections in trade or industry. Increases your efficiency: Best concentricity properties for stable screw processes. Saves time: Simple and quick recognition of the profile size thanks to high-contrast laser marking. Drive: DIN 3126, ISO 1173, Form E 6.3. Application: For all types of screw connections in trade and industry. Extra: Hole in the bit tip for TORX® Tamper Resistant security screws. Material: High-quality chrome-vanadium steel, fully hardened. DIN 3126, ISO 1173, Form E6.3.