Pencil-copter blade

This is something I made available elsewhere, but I suspect the service was too expensive to make it popular.

More of an art to this than a science (don't have 3D printer here), thus it's very likely this will need adjustment for correct size and orientation for printing. Plastic should give a little at the hub, but otherwise fit snugly on a typical 6 sided pencil.

The idea here is that of a common toy. Just one of those rudimentary "helicopters" where you use two hands to spin the axle and let 'er go!

Just one of those silly things for typical modest hijinks, and use at your own risk. I'd also recommend just using an unsharpened pencil.