These trays are used in the rules created by our friend Danny van der Wijngaard in the Netherlands and are based on Minihammer but all sizes are reduced by 50% to use with 12.5mm bases.
The sizes listed are the internal slot size. These trays come with a 5mm all round border lip.
If you require magnet holes in the base layer of your tray please contact us for a custom quote.
Find Danny’s blog here.