Used to warm the little mirrors doctors and dentists use.

They use these in the tire industry to cut pieces of rubber during the tire-making process, using either a push or pull cut, sometimes both. They're heated up via an electrical current in a special holder device that you can also use to scrape excess material off the blade. You've heard the phrase, "Like a hot knife through butter," well, it turns out it works pretty well for other mediums, too.

Set the kerf to maximum on an old saw. Is now the best drywall saw evar!

Bronze spanners for adjusting the tightness of a particular brand of bronze stuffing box. (A stuffing box, also called a packing gland, is the fitting that seals the propeller driveshaft where it passes through the hull into the water. It is traditionally filled with waxed flax cord, called packing, that squeezes against the shaft when the box is tightened. Correct adjustment admits a couple of drops of water per minute - any tighter and it can wear a groove in the shaft.)

One nice detail is that these are angled differently, so that they will be easier to work against each other when tightening the locknut against the box in tight spaces.

This is a mechanical volt meter for high voltage testing, you adjust the gap of the spheres for the desired voltage based on temperature and barometric pressure.

Just picked up the two on the left so I figured I'd do a family portrait of (most of) my needling tools.