These are awesome! They are great s as nd will probably buy more so i can have on all my necklaces. Smooth and comfortable on neck. Great product for those with long nails or for people with hand dexterity issues.
There is no way for me to attack a clasp. They are too heavy for a delicate gold chain. These are not super strong magnets.
The material seems to withstand repeat scratches & unintended albeit light abuses fairly well. The resulting chains and charms appear quite sturdy. I intend to use as many as i can!