Classics 6 of 14
Rift Tumbler
Line every gap up into one channel
Every ring has one gap in it. Turn the rings until the gaps line up and a channel opens from the core to the rim. Some rings drive others one-way, some can't be turned by hand at all, and a two-to-one gear moves its ring twice as far.
- Turn a ring and its gap moves with it
- Gears drag a second ring; driven-only rings never take a direct turn
- Every tenth lock is a vault, one turn tighter


