8x3mm Super Strong MagnetsWhy I like these: These magnets are great for holding 2 layers of scale material together to wrap tightly around your lure while adding your artistic touches. Magnets are not made of iron, but rather rare earth neodymium iron boron. This material is fragile and can easily break if bumped. Due to their strong suction, it may accidentally get stuck and cause damage. To avoid this, please handle with care and avoid slamming the magnets together.