Screwdriver bit set, 75 pieces.

• 1/4" special bits (6.3 mm) in standard length (25 mm) and very long for holes (80 mm).
• Includes screwdriver with positive spring-loaded holder for bits.
• Magnetic base for use with electric screwdriver or drill.
• Adapter with male square and male hex and corresponding attachment with female square and female hex.
• Special attachment for central screw hooks and similar parts.
• All in a durable steel box with powder coating.
• All parts have clear labeling.