500KG NEODYMIUM SALVAGE FISHING RECOVERY MAGNET D97*20MM RIVER SEA DETECTING METAL TREASURE HUNTER FINDER RETRIEVING MAGNET EN ESPAÑA

Made of n42 neodymium magnet and steel shell, the neodymium magnet is putted into one steel shell which concentrates the magnetic force on one side of magnet and increase the attracting force of magnet incrediblly (2.5-4 times compare with same size of naked magnet).meanwhile, the steel shell can protect the neodymium magnet against chipping and cracking during grabbing and clamping. this magnet can be used as tool droppers,treasure hunters,holding, fixing some parts in place in industry etc.