It's a fence for the very small Mighty Mite table saw. Just use some 1/4th inch threaded rod with 1/4th inch nuts in all of the slots/holes to stick it all
...Show more together. It's designed so you just screw the two parts together, and they'll hold very tight with the nuts/threaded rod inside of it, but wont interfere with anything. It also makes it easier to print on smaller printers.
The two holes in the end of fence_ends2.stl, stick two 1/8th inch bolts through the holes and attach nuts onto the underneath. These are to increase the strength of the little overhang so it doesnt break off. The bolts I used were 6/32 x 1 1/2 bolts that I found cheap at the hardware store that I had laying around.
There's also a little piece called fence_foot, that just goes on the end of the 1/4th inch bolt to prevent the end of the bolt from scratching up the side of the saw.
This is really handy for cutting circuit boards, to help keep the cuts straight.
For the handle, I used this printed at 96%:
http://www.thingiverse.com/thing:11405
