A:
You can, but it is not all that easy. I, personally, attach these to my hook by squeezing it on, with my pliers, in two spots, and lightly, just enough to keep it where you want it. Then to remove it, I squeeze the ends of the weight with my pliers and kind of twist it off.
It always works for me, but the next step, I have not figured out, yet, and that is after removing them, the slot that the hook is to fit into is a little small, and I need to come up with a way to widen it back out as the heavier weights are pretty thick and stiff.