The max attractive force (Vertical force): 25LBS
Some factors will reduce the attractive force:
When applied horizontally, the attractive force is usually 2/3 weaker.
When absorption surface is thin steel + thick painting.
How to separate the magnetic hooks safely:
Slide one magnet off the top of the stack.
Once off the stack, carefully start lifting the magnet.
Lift the magnet to free it from the stack.