Holder for 3/8" drive spark plug sockets, including 5/8" and 13/16".  I happen to have Craftsman sockets, but I would imagine that other brands are very similar in size.  Matches the other socket holders that I created.  

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!