Thanks for the offer. After talking to DJI's US office, I don't think they are all that necessary. It's more that people were used to the self-tightening one on the Phantom. The Inspire 1 propellers need to be tightened down. WillWill, I live in Napa and have a set of prop locks. I don't use them, so if you want to borrow them until you get a set. Call or email and I'll get em to you...Peter
916.521.7562 [email protected]