Like most of the Clockwork Apostles' tools, this stylus has dozens of applications: engraving sequence plates, soldering the joints of a clockwork prototype, or even heating up a bowl of delicious nutriment paste!
The nature of these massive spheres remains a mystery to even the wisest apostles. Could they be brass reproductions of celestial bodies? Waypoints for factotum navigation? The eggs of an as-yet-unnamed clockwork monstrosity? Only Seht knows.