Unusable as is.
These are junk. They won't even go onto the hook. The front hole is not large enough to accommodate the diameter of the hook, yes they are the right size. I'm tying the magneto stone on a Hanak 970 BL size 8 with a 3.8mm bead, just like the video. I didn't realize I would have to ream and deburr these beads just to fit them on the recommended hook.