Paint Mixer Blade

I wanted to make a paint mixer blade that could be affixed to a threaded rod and attached to a power drill. This is an attempt at a simple design. This model doesn't have a fixed size and can be resized as needed. This model is untested and will be printed soon.
UPDATE: I printed the mixing blade and sent a cheapo long masonary bit through the piece (easiest way to make it work with a drill). The bit went through the inside bottom hole about 1/4" and then I used an epoxy to lock the bit to the