Adhesive magnets won't stay stuck to the cable guide...however, the magnets themselves are strong enough to stay put.
Just as everyone else is saying the adhesion on the magnets does not last. I added some super glue which works. But the other issue is that the magnets are not that strong. The channel moves with movement of the desk, especially if the cord is somewhat heavy. Not sure I can recommend this product.
Magnets are weak. Save your money on this
The biggest problem with this cable tray is that the included magnetic strips (self-stick) are VERY weak and don't stay attached to my desk very well. I will be upgrading to some better, rare earth magnets in the future.
The long magnets are only magnetic on one side so they provide double sided tape. The tape doesn’t work well and the magnet fell off within hours.I like the metal wire cover and just need to figure out how to make it stick to my desk for good cable management.