1 2 3 block / 123 block / 1-2-3 block holder

1 2 3 block holder.
The tool holder module couples with the attachment plate module, print one of each and you have what you need to hang a 1 2 3 block.

1 2 3 block size 2-15/16 x 1-15/16 x 63/64" (75x50x25mm).

MODULA - a module based tool holder system

This module attaches to the adapater biltema  or the vanilla adapter available here on Printables. The vanilla adapter can be modified so it fits wherever You need to hang these modules.

A universal adapter for (metric) PEG boards, this one fits Biltema, Jula, Clas Ohlson, CC 12mm (15/32 inch) spacing of the 4mm (5/32 inch) diameter screw holes.

The idea is a adapter plate (metric/imperial/plain) that attaches to a module, the module snaps on to this adapter with dovetails.

Why use an adapter? Everyone can share the modules worldwide, and just adjust the adapter plate for their needs.