This is a gridfinity bin, for storing ‘holpijpset’.
‘Holpijpset’ is the dutch name for the tool, in english it would be "hollow pipe set' and is being used for puncturing round holes in various materials (e.g. leather, vilt, etc).
Dimensions: 1 x 3 x 5
Bin Length and Width are 42mm.
Bin height is in multiples of 7mm + the lip the Bins stack on is 3.8mm.
1x1x1 Bin would be 42 x 42 x 10.8mm.
2x2x2 Bin would be 84x 84 x 17.8mm.
The Magnets are 6mmx2mm.
If you are unfamiliar, please see the original video on the Gridfinity project:
The author marked this model as their own original creation.