Just brainstorming here but.....

A couple of 'biners

1) holds things on to your belt, pack, keychain

2) Improvised toggle to replace button (A little large but better than dropping trou.... <img src="images/graemlins/wink.gif" alt="" />

3) compined could make a compound pully arrangement to increase your pulling power


A couple - 4 nails + improvised hammer / multitool, stone, brick, handy piece of metal from wreck of downed plane you are climbing out of etc.

1) attachment point for biners used as #3 above

2) Steady / reinforce damaged structures

3) Pot-stand for small stove

4) leather awl

5) Attachment point for snare wire

6) point for spear (hunting and self-defense)

7) Chisel for wood working in shelter building

8) Nail for shelter building.

9) pin replacement for grenade <img src="images/graemlins/shocked.gif" alt="" />