Zippo Shell Precision Screwdriver Set

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I loved Laura Kampf's Zippo bit safe idea, but four bits seemed like a huge waste. Precision screwdrivers are used much more often than full-sized tool bits in my workshop, so I designed a version around them. This set features a precision screwdriver handle that doubles as an adapter to a full-size (1/4" hex) bit. The insert to hold the bits is 3D printed, as well as a driver end with a rotating head (utilizing a 623 bearing) for use like precision screwdrivers typically come with these sets. The insert holds the main driver/adapter piece, plus 12 of these smaller precision driver bits. In place of one bit, you can include an extender as shown, but it will need to be cut down slightly to fit inside the Zippo shell. Earlier versions used a friction closure like Laura Kampf's version, but I couldn't find a way to make that work without wasting space or making the bits hard to remove. Instead, I used a length of 1/4" wide pocket tape measure as a spring to hold the lid shut.