Can you name these tools and what they're used for?

I don't draw tools often, so I can't make them up or machinery or robots to save my life. Instead of copying reference images, this week's exercise was basically me practicing drawing the object from a different view (and failing).

I love inking, so this did force me to break out the old crusty Rapidographs. Sadly, my most used ones have gone to Pen Heaven. Rapidographs are a bit of a hassle as they require cleaning and recently I'm short on regular ink pens. To the other artists, I ask, what brands have you used and recommend?