19mm and 27mm motor wrench

This motor wrenches are newly designed based on the idea of http://www.thingiverse.com/thing:981384 for 19mm and 27mm. These are the common motor sizes for many quadcopters and 130-ish quadcopters.

You will need additional M3 screws, lock nut and washer for the best result. Also you should use some rubber seal to let the wrench grip the motors firmly