Description: The reciprocating electromagnet used in this product is a better magnet after repeated experiments, replacement and calculation. It can cooperate with hall sensor to generate magnetic force in a better position and achieve better operation effect. The bearing used is ball bearing with low friction and quiet durability, providing strong support for smooth operation. This product uses high-precision cutted acrylic support and USES four bearing blocks as the fulcrum, which is more stable and durable.