This is a remix of my other model of the key holder to have 12 3x6 magnet. 4 of magnets are for holder screw and other 8 are for having the block stick to a fridge or the side of a tool box.
Set Printer to pause at 3.60 to put in the first outer magnets. Pause at 5.40 to put in the inter 4 magnets for the screw or nails.
The author remixed this model.