The projects in my HS machine shop class were a single hole paper punch made like a punch press, a cross pein hammer and a screw driver with hollow handle and milled hex. all the projects were nicely polished; I still have the hammer and screwdriver, now niter blued; the paper punch I gave to a girl friend from the day; I asked her if she still had it a couple of years ago, but sadly it was gone. After I started apprenticeship in '64, I made a pair of parallel clamps, using brazed on carbide tool shanks for the steel, and two sets of hardened parallels of 0-1 steel and a pair of 1-2-3 blocks, also 0-1 steel, using scraps from shop jobs; since then I made several dial indicator accessories for deep holes, after designs from tools made at the local Navy yard. I very much like the design of RandyM 's hold down clamps that are reversible; I'm surprised that someone does not manufacture them, at least, I have never seen anything like them