Holder for 3/8" Metric Hex/Allen sockets.  I based this on a generic no name set that I own, but I assume most brands will fit.  Gridfinity compatible, 1U (W) x 3U (L) x 3U (H).  Includes a nib at the bottom to help avoid dropping in sockets of the wrong drive size.  Matches my SAE hex holder.  If this holder is too small, check out my Pittsburgh (Harbor Freight) in Metric and SAE hex/allen socket holders.

My design specifications:

• All holders are 3U deep for a uniform look.
• Must pass a drawer SLAM test.  (I use my tools, not just look at them.)
• Left to right layout with smaller sockets in the front.
• Clear label for the entire set in the upper left corner.
• 0.8mm hole clearance around all sockets for easy insert/removal.
• 1.5mm border around all holders.
• Clear labels that are 0.4mm nozzle compatible.  Font is Arial Narrow, bold, 5mm tall if you want to make something to match. 
• Beveled/filleted edges to make sockets easier to insert.
• Include holes for 2mmx6mm magnets, but I personally don't see the need.
• Part of my socket holder collection: [https://makerworld.com/en/collections/7481883-robnordic-s-socket-holders](https://makerworld.com/en/collections/7481883-robnordic-s-socket-holders)

Happy Organizing!