RX2535 propeller cutter
This prop cutter can be screwed on Dremel to cut RX2523 propellers down to 1.88 inch or 1.9 inch, so you can use them with Mini Owl 88mm indoor proximity quadcopter
You will only ever need one adapter and then other handles can be designed and printed to accommodate other propellers.
If you own 3D printer then you can download STL file for free
and print it yourself.