They are awesome and sealed in the original packaging and never been used. These were a spare set of bearings incase something happened to the ones I was using. They are packed with high speed lube for super fast roller blading.
Yes your right they were meant for skateboards but I used another set of these on my blades and they worked awesome. I replaced the bearings from the roller blade wheels and added these to them. A buddy of mine had done to his and I did the same to keep up with him lol. Its a light modification to fit the right but worth the trouble. For skateboards theres no modification needed.