Protective magnetic bar type SM are equipped with an extra-strong neodymium magnet system and fully protected by a stainless steel cover. They are used to protect machines, systems or vehicles against damage caused by metal parts. SM protective magnets can, for example, grown over/under mined bulk to container exterior walls or on vehicle tires. Even small metal parts are safely caught up to a distance of about 145mm. Several SM protective magnets can be fitted together to form a larger system.