Works greatThese are exactly as the OE. Easy to install & feels sturdy. Just plug & play basically. Flys perfectly fine. If you have old blades, I suggest to change them just in case they fall or break in mid air. I noticed one of my old blade snap from the bottom clip. I went with the gold stripes. Definitely satisfied with my purchase ?nice replacement blades for the dji Spark. works as should.They're nice propellers they're bright red and blue so I can see them better than the black onesFit the Spark and work wellAlright maybe I got lucky, but these props work just like my original props. Quick background. I like most people ordering these props crashed my drone and broke a propeller. It was not a hard crash and honestly was a silly mistake. ( I am proud of my flying skills and this was the first time ever crashing it) so me bieng the cheap scape I am ordered these props. They were the cheapest I could find at the time. So the props came in and I immediately noticed how similiar they looked and felt to the originals. I took off all my props and recalibrated the sensor and the GPS. I then installed all my original props along with the extra aftermarket one. My drone flew completely normal. Footage looked the same and handling was good. I then replaced all of them with the aftermarket because my thought is it's better to fly with all the same props even if I couldn't tell a difference. The drone flew just as good.So why all the negative reviews? Heres my thoughts.1-The pilots probably didnt recalibrate their sensors from the last time they crashed.2- The pilots probably didnt install the props correctly. Perhaps they forgot to lock them right?3- I got lucky and got great aftermarket props and they got unlucky and got bad aftermarket props.Tldr: my drone flies exactly the same with these props as the OEM props. I recalibrated the sensors and replaced all props with these and it worked great.Let me 1st start off by saying that these props do exactly what they are suppose to do. With that said, if you think that an after market knock off is built to the same specs as the OEM set, you're sadly mistaken. They may be designed to do the same thing but there specs will not be the same. Only an idiot would mix and match props. If you replace all props so you have an exact matching set, you will have no problems. It is unnecessary to recalibrate anything if you replace all props. THESE PROPS WORK PERFERCTLY IF YOU REPLACE THEM ALL. For the price why would you risk crashing your drone mixing and matching setsI have found 2 of these thus far do not fit properly. While they can be forced on, they will also have to be forced off. Not sure how the last 2 will be, checking them today.That aside, the 4 that did fit where good and flight seemed to be working as planned.While it may not totally be needed, I suggest a IMU calibration be done before added these.Excelentes hélices genéricas, resistentes y de buena calidad. No le piden nada a las originales del para dji.Excelente calidad de hélices, las compré por qué ya había roto mis props originales, sin duda las volvería a comprar