SKF invented the ball bearing in 1907. The deep groove ball bearing aka DGBB is the most widely used bearing type in the world. A common DGBB is the "608" - the size used for skateboarding. SKF has over 200 types of "608's". Under High Radial and axial loads, it performs at higher speed than any other bearing.
SKF is undoubtedly the bearing technology and knowledge leader. SKF's bearing Life Theory in ISO 281 were adopted as the new DIN ISO Standard globally in 2006. This means that any bearing manufacturer in the world measures their performance against SKF.
Plus Alexis Sablone skates them, so you know they're good.