About this 3D model

Thanks to the original designer, I added magnetic adsorption to the original design and changed the way the pointer was fixed from screws to plugs, making it easy to use. You don't need to buy such long screws and nuts. The magnet is 6*3mm Please note: Please try to attach the magnet firmly to avoid the magnet from falling off and children from swallowing it. Those who are capable can embed the magnet through the print pause function.