ジャックパズル

The brass has a nice weight to it, and the milling on those six notched bars is precise enough that they slide apart only when you find the right angle. I keep it on my desk and it's become a good two-minute break between meetings.

The weight of the brass in your hand is honestly the best part — six solid bars that fit together with this satisfying little click. I keep it on my desk and fidget with it during calls, and it hasn't loosened up at all after a few months.

Took me a solid twenty minutes to figure out how the six notched bars slide apart, and I actually enjoyed the fiddling. The machining is so precise that the pieces fit together with almost no wiggle.