ziplock magnet holder

Allows you to attach one 8x3, one 6x3 or two 6x3 magnets to the slider clip of a ziplock bag: https://www.costco.com/ziploc-slider-storage-bag%2C-variety-pack%2C-166-count.product.100411675.html 

You can then hang the ziplock bags on your fridge, pegboard, or magnetic tool holders

=== 2023.9.9 Update ===

Fixed the step file exports — previously they included the sketch model of the ziplock