Strong one-way packaging magnets are neodymium-Iron-Boron magnets we developed one of the most important in recent years. First of all, the biggest benefit is the consumer customer, in materials at greatly reduced costs. Compared to a single-sided magnets and the same two-sided magnet, single-sided magnets cost cheaper price 3 in 1. performance than double-sided magnets and magnet strength. Do wine bottle box, packaging box, cake box. Use preferred products.