The Wiha Tools 77793 29 Piece Ultra Driver 26-in-1 Bit Holder Socket Set provides users with a 26 bit magazine is equipped with 13 different drives at hand. At the press of a button, the bit magazine at the handle end comes out, delivering the 25mm bits with a 1/4 in. drive ready for removal. The 77793 provides users with contained standard bits that can be used for both manual and machine operation. The Wiha Tools 77793 features an ergonomic cushion grip handle for comfort and control. For secure and quick bit changing, the Ultra Driver has a locking bit collar and spring riven pop up cartridge. The ergonomically shaped two-component handle ensures optimum power transmission and maximum torque values. Powerful screw fastening or loosening is therefore particularly easy for the hand. The Wiha Tool's 77793 features steel that is specially heat treated to maintain strength, durability and precision.