Pro magnets are rare earth magnets with a cork screw wire attached. They are screwed into soft plastics in the right area to hold the treble hooks into position. Use them on our Swimmin’ Dawg, Shallow Invader, Bull Dawg, or any of our soft plastic baits. Keep the hooks from tangling or leader wrapping. Hooks are also in perfect position for better hooking percentage. The 10mm size are perfect for larger baits like Magnum Dawg, Super Magnum Dawgs, Magnum Swimmin' Dawgs, etc.