So once it gets stuck I'll hit it with a hard object right where it says do not hit with hard object

That's why the magnet was busted. The guy I got it from gave it a beating. I'm thinking I will use it for now and look for a replacement in the meantime. I have 2 batteries and a saltwater trolling motor to get me back. It's on a 15 ft mako I just use in the river. So I won't be getting stuck offshore. Thanks. And any more info will be appreciated.