The Crescent 30 PC u-GUARD(TM) Impact Driver Bit alphaCASE (TM) set provides a durable, non-marring fastening solution with enhanced control and safety. The Crescent u-GUARD (TM) fastening bits have a protective sleeve that serves not only as a preventive non-marring cover, but also allows the user enhanced control and safety. Designed for enhanced strength and durability, u-GUARD(TM) bits feature a full body design for up to 2X greater life. That u-GUARD(TM) bits and full body insert bits feature optimized tip geometry for increased fastener retention and have extended bit life from the unique steel formulation and proprietary heat treat process. This alphaCASE™ set offers superior versatility and customization with pivoting, detachable rails for ease of use and organization. Its superior durability allows it to withstand heavy use on the toughest jobsites, making it a must-have accessory storage solution.