The tapered reamer is often called a repairman's reamer.
They are also called other much less flattering names, along with repairmen who use them,
by machinists of all sorts. They are kind of a shortcut tool offering no precision at all.
I do often use them to take a burr off a drilled hole though. Quick for that.
The expansion bit goes into a regular crank brace. When they are sharp they don't drill as precise a hole as a good auger bit, but they can still do an acceptable job.
The cutter in it is adjusted almost as short as it goes. This bit will drill a 1 1/2" hole easy.
It probably came with another cutter as well. A longer cutter. it was customary to supply these bits with 2 cutters.
The long cutter will drill a 3" hole!!
I wouldn't want to try that on 2" thick rock maple, but on pine or something they work well enough.
No real idea about the last one. It almost looks like part of a faucet seat dresser set.
yours Scott
