I just had to take one apart after my post above (#50) where I mentioned a concern of mine about what I thought were rivets holding the props on. I was then rightly corrected by
rtr32 that they are actually screws, and I then posted that I looked again and saw that they were 'hex' fasteners.
Well, they are T7 self-threading Torx fasteners, and they are steel, as they were magnetic. When the two fasteners are removed, the two black frame halves separate, and the blades can then be removed from a pair of plastic posts on the upper half. It is these posts that the fasteners screw into.
On DJI props, the blades and frame halves are 'through and through' riveted as far as I can tell, and I have yet to hear about a confirmed rivet failure. On these props, there are screws.
I only mention this because I have often said that aftermarket props and batteries should be avoided at all times, but I have also heard and read a lot of positive reviews regarding MAS props. Regardless of performance/noise/flight time..., my chief concern is, will they come apart in flight. After taking one apart and seeing how it's held together, I have no concerns at all. MAS could have used cheaper aluminum fasteners, but they used steel. That is telling of their quality.
Like any prop though, inspect, inspect, inspect, prior to and after every flight session. With these, periodically include checking the snugness of the fasteners..