i really like the thought of making separate kits for different things. one for sewing, one for first aid, one for fire starting. these tins are small enough that you could have a bunch in your glove box.
Leatherman - MUT EDC Multi Tool Rifle Maintenance Tool, Black with Molle Brown Sheath I carry this MUT. It is versatile and the brass scraper will really save your fine edge blade. Well worth the price.