1Place the magnet in to a vise. Make an effort to get yourself a vise that's attached to a table additional support. 2Place the chisel onto the superior with the magnet. Place the chisel across the plane that you just wish you break the magnet. If you would like break the magnet lengthwise, position the chisel lengthwise, and so forth. 3Hold Rubber Magnet(strip) the chisel with your left hand and strike your head of the usb ports with your hammer. In the event the chisel doesn't crush from the magnet, replace it for the original plane and strike it again. Keep striking the chisel until it cracks over the magnet. 4Set the hammer and chisel aside if they don't seem like working, and get your Dremel with your Ceramic Magnet diamond abrasive wheel placed on it. Set it up by plugging it in, staying with the protection precautions. 5Turn the Dremel on, even though it spins, push down over the spot where you need it to cut. Don't press too hard or apply a lot of pressure within the diamond wheel or maybe you may break or bend the Dremel. As diamond could be the hardest substance, it should be capable of track the magnet easily.