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.
I imagine that this wouldn't be a necessary item if you have sharpened more than a few knives on the Edge Pro. I however, just got this system and the magnet has helped loosen the death grip I was experiencing before I added it to the mix. It works well with the stock rest but don't count on it helping much if you have the small knife attachment installed. The magnet was strong enough to hold an Opinel No. 8 Carbon in place all on its own during sharpening (probably not recommended though).