This is a socket organizer specifically designed for the Craftsman 309 piece tool set model number 41309, but it could also be used for any socket set. Each socket was measured with a quality set of calipers and a clearance of 0.6mm around each piece was provided but some of them are SNUG so I recommend printing a test block at a reduced Z axis before going full scale (I used 10% to test fit). I included the raw STL of each individual piece so you can edit the hole sizes if needed. This is my first venture into CAD design so any feedback is welcomed. Hope you enjoy!! Any questions I'll do my best to help you out but I've only been at this a few weeks. The drawer this is designed for is 22.25x10.63 inches and it fits exactly into this size drawer, You may have to install it in multiple pieces depending on the config of your toolbox mine has rivets in the sides that I had to contend with).