title_body: How do I attach a propeller to this motor?
upvoted_answer: You use one of the provided rubber rings to attach the propeller to the motor. The 2 protruding screws with their heads are the anchor points for the rubber before it is wrapped over the prop to the other screw.
  The propeller motor connection is not rigid but has a little give and comes loose on impact, hopefully saving the propeller and the motor that way.