I wanted a screwdriver to keep in my camera bag with all of the relevant bits for my camera and equipment. I wanted it to be short enough to fit into a particular pocket on my bag, yet have storage for all of its accessories. The handle is long enough to store a bit extender as well as the bits I chose to use a PET soda bottle cap to contain it all because it's a proven design and if I lose it, a replacement is as close as the cooler in my car.