The first I carried for more than a decade, as a Marine. It was issued to me as a young PFC when I joined my first squadron. For some reason, it's called a TL, but it's an Electrician's Knife. The locking blade is a screwdriver, pries open cans, makes adjustments to some equipment in the field, and can do all sorts of things. The blade can be honed razor sharp, strips wires, shaves faceplates that don't fit radios, and cuts torque stripes to fit instrument faces. Every now and then, I'll come across another TL in a drawer or a gear tray. I'd get issued a new one now and again. Some have serial numbers engraved on the scales, some have my initials for control. Tina loves the one she took. She keeps it razor sharp as well and uses it all the time.

The second knife is a little less common. It's an OTF auto I bought on a trip to Gatlinburg when Tina and I vacationed with my patrol partner and his wife one year. The wives went shopping... and so did we. We wandered the knife shops, they went other places. We wandered into the back where they had a case full of autos, and with our creds they were happy to sell us a couple. I carried this rarely, the benchmade folder was faster, sharper, and more dependable.
I use this ... for a letter opener.

If it dies, I'll take it apart, remove the spring, and keep opening letters with it as a gravity opener.