Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2589824.

I used KatTrue's parametric center finder to create a 50 mm long version with a 3 mm hole in the center. It is handy for when you need to find the center of an object.

An example would be if you had a board and you needed to cut it in half lengthwise. You hold it so each little round cylinder is next to the edge of the board. You then put your pencil / pen in the hole and slide it down a board.

Filament is Makergeeks sun punch yellow: https://www.makergeeks.com/products/maker-series-pla-3d-filament-175mm-sun-punch-yellow-1kg