This is a general SHTF survival kit?

- spool of dental floss. Remarkably strong for its weight, and even a small spool is a hell of a lot. Can serve as snare tripwire, light fishing line (quite stout if you braid it), arrow fletch binding, repair thread...

- fish hooks

- fairly heavy needle for patch work.

- a couple more zip ties could be handy, they are sometimes easier to use than tying or taping. If your SAK has a tiny flat screwdriver to pop the latch you can even reuse them a bunch. Even if the latch loses its springiness and doesn't grip well, you can shove a splinter in there to lock it up good.

- plain birthday candle: source of wax for lubrication or waterproofing. Also has obvious uses in fire starting.

Trying to think of small handy things that won't add a lot of bulk. You've already got the bigger tools. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />