Also referred to as a double cross or Pozidriv, the Z-shaped cross recess represents an advancement of the cross drive introduced by the Phillips Screw Company. Unlike the conventional cross drive, the four flanks of the screwdriver blade in the Z-shaped version do not taper towards the tip. This design enhances the lateral grip for the screwdriver bit and diminishes the occurrence of the so-called cam-out effect. The cam-out effect is typical in traditional cross drives, where the tapering causes the bit to be pushed upward and out by the torque exerted by the cordless screwdriver. What this translates to for you: No more concerns about screwdriver bits slipping out, making your work easier with significantly less effort. This efficiency saves a considerable amount of time.