My EDC for many years was a Kershaw 2001 Good Buddy that fit nicely in a pair of dress pants pocket, even better in business casual khaki's:
It has a small-ish blade, and a straight screw driver, file, and ever essential bottle opener.
Unfortunately, they no longer make this knife, and I broke the back spring on mine a couple years ago:
I resorted to eBay to find and purchase a couple of them in very good condition. I lost a second one, and am now carrying the last of my supply.
But, now that I am retired, and mostly wearing jeans or canvas type pants, and working outdoors every day, I've stepped up to one of two bigger knives with pocket clip. First is a Leatherman with serrated blade, straight and phillips screw driver small clip, and of course the essential bottle opener:
Since Kershaw has an excellent warranty program, but also since they could not replace the broken back knife, they gave me an option to select another knife, and I chose a nice very thin pocket clip knife with lock-back serrated blade, and of course, a bottle opener.
Anyone notice a common thread in my choices?