Twist the shaft and watch two nuts travel in opposite directions along a single threaded bar. The central shaft carries two helix grooves cut into it, one right-hand thread and one left-hand thread, so turning the shaft sends the nuts sliding apart on one rotation and drawing them back together on the next. The colourway is unique to each piece, and the mechanical precision of the dual grooves is what makes the whole thing work.

Rotate it slowly and the mechanism engages with smooth resistance. Each nut follows its own groove, one moving left while the other moves right, creating a steady back-and-forth rhythm that keeps your fingers busy. The star-topped nut carries concentric ridges around its outer rim, and the basket-weave segment on the shaft invites your thumb to trace its raised texture.

Time slips when you pick this up. The small detail is the irregular organic-shaped inner hole on the middle ring, the one that catches your thumb on the third or fourth turn and makes you slow down just to feel it.