A Leatherman Charge TTi is on my belt most days at work. Not a day goes by without me using it. The full bit set is a must. Weekends, I usually go with something smaller like the Lestherman Squirt ES4, or the now retired Leatherman Multi-Tool. Sometimes even a Victorinox Tinker, although I am a Leatherman fanboy.
https://www.leatherman.com/charge-tti-7.html
http://www.leatherman.com/squirt-es4-21.html
https://www.leatherman.com/mini-tool-83.html
https://www.swissarmy.com/us/en/Products/Swiss-Army-Knives/Medium-Pocket-Knives/Tinker/p/1.4603