This is a magnet insertion tool , a permanent magnet is placed in either end of 2 pens. The polarity is opposite in both pens. 3x3 mm magnet fits at small end and a 6x3 mm magnet fits in the larger end. To arrange magnets they can be placed on metallic tray in the middle of the base.This allows sorting and insertion of the correct polarity of magnets in your projects. It is advised to print the contrasting polarities in different colors of filament.

Here is the video on how it works. Click the link below
https://youtu.be/kLuPIJmwxhI?si=OJtTS2t8EKi1lzcF

ELEGOO

ELEGOO NEPTUNE 4 Max

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No

20%

This is the metal sticker I used to arrange magnets on.

SALEX Phone Metal Stickers for Magnetic Mount. Replacement Set of 16 Magnet Metal Plates Inside Cell Phone Case. Silver Sticky 3M Adhesive Backing Car Small Rectangular Iron Discs for Holder Crafts https://a.co/d/eqPDXYQ