Meets your requirements: Robust and precisely fitting bits for general screw connections in trade or industry. Saves time: Simple and quick recognition of the profile size thanks to high-contrast laser marking. Increases your efficiency: Best concentricity properties for stable screw processes. Drive: DIN 3126, ISO 1173, Form E 6.3. Application: For screw connections on plus-minus screws in control cabinet systems, fuse boxes, terminal blocks and relays. Material: High-quality chrome-vanadium steel, fully hardened. DIN 3126, ISO 1173, Form E6.3.