If you are new to them, let me tell you what they are and how you can use them. As they are magnetized, you will find a magnetic closure at each end which is going to automatically cling to its counterpart to close the jewelry piece. It will be a magnetic closure and the closing mechanism is going to be automatic, that means the jewelry item is less likely to fall off from the person who is wearing it.
Mostly, the jewelry makers use box clasps for fastening the jewelry. You have to place a fitted box on one side of the necklace. There will be a box housing it with that will come with a notch. At the other side of the necklace, you will have to attach a flat piece of metal which has to slip inside it. In order to tie them together and to untie them, you are going to need to put some efforts. In order to make the small flat piece come out of the box housing, you will have to press the two ends. It is going to be a lot harder to fasten and unfasten it. For a jewelry maker, it might not be much troublesome to attach them but for the one who has to use that particular jewelry item, fastening and unfastening can get really problematic. This is one reason why I have found many clients who request to make jewelry items using the magnetic clasps just because they are easy to open and close.
Even those clasps that have hooks and an eye closure are not worth it. They are mostly used with necklaces and bracelets. One end of the jewelry item has a hook and the other end has an eye. You have to make the hook cling into the eye to close the jewelry item. If the size of the hook is small, you will again have to face trouble in clinging it into the eye. It is not always convenient to wear jewelry items with these clasps.
Nevertheless, magnetic clasps have been the best option for making jewelry for kids as well as adults. Some believe that these clasps have special healing powers and they are best for patients with joint problems, arthritics, high blood pressure problem etc. On the whole, if you will be wearing a jewelry item made from these clasps then your life will become easy.