[ Granuaile sticks her flashlight in her mouth, the rest of her keychain smacking into her chin. But it leaves both hands free to carefully turn the section of pillar without overspinning it past the correct point. She soon becomes aware that it must have some special balancing system built in, because as she turns it a certain amount, there's some resistance as it slots into place, naturally stopping so she'd have to use a little force to spin it again. It stops a person from just running a hand along it and spinning it until it loses momentum. Ingenious.

And she takes the flashlight out of her mouth to speak. ]

I think it clicks into place with each turn. The carvings don't line up, though. I'll keep going to see if I can find a bit that does.

[ And if they don't, they'll just have to try something else. ]