Excuse me if someone has already posted something similar to this, but...
Although I do have various saws, I like the design of the Fiskars (Gerber) hatchet I've had for a while and it dawned on me the other day that the 12 in. hallow handle could be used to squirrel away a few extras. A disposible poncho, generic space blanket or trash bag for emergency shelter, length of para-cord, matches or whatever based on preference.
Thing is, if you cram something in it that fits snuggly, a piece of cord tied to it would be needed to facilitate removal.
Now, I'm not suggesting to use this as a primary survival tool. "Redundancy" just seems to be a popular word here.
Just an idea...