The Bosch Custom Case System comes preloaded with Impact Tough™ Bits, delivering the best case for the best bits. With the Xtended Torsion Zone, Bosch Impact Tough™ Bits have been upgraded to deliver 10X life over standard bits. The Xtended Torsion Zone absorbs torque peaks to reduce stress at the bit tips. They are designed to handle the additional torque of today's impact drivers. This jobsite-tough case features a clear-view front to let you see inside without opening. The durable, well-designed case for the screw bit set provides tilt-in/tilt-out convenience for easy access to the driving bits. Since it's customizable, it helps increase user productivity by reducing time searching for the right bit.