Combination Square Set Holder -- Gridfinity 8x3 (2pcs)
Holds all 4 parts of the combination square set with the ruler in a groove at the bottom. I designed this for a Tumico square set. I don't know if it will fit other brands. STEP files included if you need to tweak the tool outlines.
This is an 8x3 Gridfinity item, so I split it down the middle with interlocking dovetails so it would fit on my print bed.