Two nuts race in opposite directions along a single threaded shaft, pass each other, reverse, and start all over again. The dual helix grooves run side by side so the right-hand nut climbs one way while the left-hand nut climbs the other. Each completes a full loop at the same time, then the whole cycle begins again.
Hold the shaft steady and use your thumb to spin the nuts. The movement is smooth and continuous, with no catch or resistance between directions. It is the kind of thing you pick up without meaning to and end up holding for five minutes while watching the pattern repeat.
Sits on a holographic base that catches light with every rotation, adding a second layer of visual interest on top of the mechanical paradox. Slip it into a bag or leave it on the desk. Your hands will find their way back to it.










