That letter opener thing is a bone folder. The ruler is a safety ruler with a flap that protects your fingers if you use a cutting knife. That is a furniture needle - super useful. The pointy thing is an awl, for making holes in the signatures. The brush is for smoothing out the glue

The bottle is for holding up the ends of the journal when I'm working on one end. The thread is linen and comes in a roll of several thousand metres, I think.

I and J changed it up for me. Quite pleased with this set-up! They did an awesome job!