The amazing EDC-Key by Maratac™ was developed by EOD Robotics in 2008 for use by military robotics repair technicians.
Already had a 2 way bit. Cap worked great with it on the keychain. Good quality too.
A lot of edc items are rarely used and kept only as a just in case sort of scenario. This screwdriver is used regularly. The bit is actually a handy size, fitting #2 Phillips and 1/4" slotted screws. If course the bitholder will hold any 1/4" bit, and the bitholder can be removed from the plastic grip sand used in a drill or impact. This tool is so handy that I have one on each keyring I have and I've purchased others for guys I work with. They all say that they've found it very handy and gets regular use as well.