The amazing EDC-Key by Maratac™ was developed by EOD Robotics in 2008 for use by military robotics repair technicians.
I never leave the house without it. I attached it to my Swiss Army knife as part of my EDC.
This is an excellent alternative to carrying a multi tool I wrap tape around the outside, and slip this into the sleeve pocket behind my cell phone, along with a set of mini pliers. Along with a pocket knife, this set handles most chores with ease.