> Attempting to use a Phillips screwdriver bit is likely to cause damage because the design difference between them is fairly significant even though at first glance they appear to be very similar. A Phillips driver has an angle on the flanks, a pointed tip and rounded corners. The Pozidriv screwdrivers have straight sided flanks, a blunt tip and additional smaller ribs at 45° to the main slots. The Pozidriv was designed specifically to allow much greater torque to be applied because of its more positive engagement.