“The magnets are really strong and work perfectly. The counter-sunk holes are perfect for using bolts to attach the magnets to parts. I use the magnets in 3D prints and inserts to make practical tools.”
“The magnets themselves seemed fine however the problem i had was that when i tightened the screw the magnet broke in two. This happened to both of the magnets I purchased. Seems logical that this may happen (once it did) so really a bit of a design flaw. Shame that there wasn't a warning not to overtighten the screw (I am not normally cack-handed).”