Bosch DDMSD40 Impact Drill/Driver Set, 40 Pack:

• Driven Sets provide 50X life over standard bits
• Driven design – provides 50X life over standard bits, with a torsion zone built to last, hardened surface and precision tip
• Precision-milled bit tips – deliver a better fit and less cam-out
• Torsion zone – built to last, with a new tapered design, it absorbs the torque peaks of impact drivers to avoid breakage
• Heat-treated bit manufacturing – provides more durable bits