• External hexagon drive to DIN 3126 / ISO 1173 - C 6,3
• Can be used by hand or with and electric screwdriver
• Includes bitholder and 1/4" socket adapter
• Ideally suited for fittings in trade and industry
• Orderly arrangement of the popular 1/4" bits
• Sand blasted
• Special steel
• In durable plastic storage case