Inspired by a 1920s design, I have crafted this gadget in credit card format. For optimal functionality, you will require two 625ZZ ball bearings (EA016 Maker's Supply) – many makers already possess these! – and a ballpoint pen spring.

The bearings must rotate flawlessly; therefore, they should be immersed in a degreasing solution and subsequently lubricated with WD-40.

For the carbon fiber effect, the Fiber Carbon plate (as depicted in the photographs) is necessary.

Should you desire wheels indicating more than six options, please inform me, and I will create a bespoke design. For instance: one wheel with eight numerals and the other with twenty.