Screwdrivers are survivors. Rather than face extinction by the superior screw-torquing thrust of power tools, they've adapted and evolved into versions that are more useful than ever.
This bit-packing, auto-loading screwdriver works like a mix between a multicolor ballpoint pen and a pump-action shotgun. Extend the handle (inset A), align the desired bit with an arrow, and re-engage the handle to load. It switches bits with unmatched speed, letting you quickly take on screwheads of various sizes and shapes. If you're attacking specialized screws, engage the bit in the handle you're replacing and pull it out of the hex-shaped end, then put in any standard 1/4-inch bit.