Review on FGen Fingertip Skateboard Bearing - Enhanced for Dedicated Performance by Drew Panah

I have these to attach to the ends of spinners for a 3D printer I'm making. I've also used them to carry some, many, more than I probably should have, tricky spinners. For the spinners, it was easy to remove the red guard, use regular hand soap and a cleaning toothbrush, and brush them three times to get them spinning effortlessly. Excellent. It was a great deal and I plan on buying them again and again.