FRankly this should be included as part of the package.
Was glad I got this attachment. It helped hold the blade at the right angle when starting out to sharpen smaller knives.
When I originally order the sharpening kit I thought this might shorten the learning curve and yes it sure did.
Great little tool for helping learn to use the Apex sharpener. Good for holding smaller blades, its small and doesn't get in the way. Easily removable for when you don't want to use it.
Switching the magnet on and off is easy, it's strong enough to hold large blades to the deck with no assistance. It's a great help for blades you have a hard time keeping at a consistent resting position during the sharpening process.