A good multitool substitutes for a can opener, bottle opener, and even potentially a stuck jar lid opener. Some models of SAK can open wine bottles; my theory is that if I have wine and no corkscrew I will resort to lower-tech methods of opening. I also have a P51 can opener in case the Wave isn't available to open cans.

Padlocks and the like are not easily opened with small tools. A bolt cutter, while very handy, is large, unwieldy, and tends to gather unwelcome attention when carried around. I have one at home but not in a car kit. Ditto with larger pry bars.

The opening tools I carry in my BOB are a pocket widgy, a breacher bar, a knife, and a multitool.



Many things that I need to open can be suitably dealt with by using the appropriate screwdriver. The multitool in my BOB is a post-2004 Leatherman Wave with the full bit kit. My car kit includes a screwdriver, a nutdriver and a comprehensive set of regular and security bits.



My car won't run without a coded key. Plastic bucket lids open nicely with pry bars. I typically use my razor-sharp RSK Mk1 mini to open difficult plastic packages. Lock-picking takes a lot of skill and specialized tools. In many jurisdictions possession of those tools is a crime; I don't carry them. It takes me a long time to pick anything other than the most rudimentary lock. With a key that fits in the keyway, the file on my Wave, and some time, I could theoretically make a bump key.



I carry freezer bags and cable ties in my BOB, but otherwise I don't worry about it too much. A plastic bag and a cable tie can close bottles and cans. Carrying spare locks and chains sounds like a lot of weight.



Your list is excellent.

Paracord can close a lot of things up. I carry a "tube vault" with CR123A batteries in it; it could be repurposed to keep an ounce or two of something secured. Saws are good to open a variety of things. Spare keys to important things can be very handy.