Here is Drone Propeller accessories which include M5/M6 sized CW, CCW Nut Cap also Motor quick-release wrench. This Bullet Propeller Adapter Holder for Brushless Motor. Adapters are a collet style that grips the motor shaft when tightened.

A propeller is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral, that, when rotated, performs an action which is similar to Archimedes’ screw. It transforms rotational power into linear thrust by acting upon a working fluid, such as water or air.