Deep-Well Socket holder to replace the crappy plastic sprues that came with these sockets. The main version and the one I use has cutouts internal to the model for 1/4" disc magnets to be inserted which both hold the socket in as well as allow the base to magnet to a surface *even a vertical surface). Magnets used were K&J D42's. 2 Versions of the file are available. "Nomag" has the cutouts for magnets removed if you didn't want to use this option. Everything fit very well in my case. I programed several pauses into the print in order to drop magnets in and to change out color for the lettering, etc.

The exact sockets I am using are linked below, your results may vary.

https://www.homedepot.com/p/Husky-3-8-in-Drive-Deep-SAE-Socket-Set-10-Piece-H3DDPSAE10PCSR/203559420
https://www.homedepot.com/p/Husky-3-8-in-Drive-Deep-Metric-Socket-Set-10-Piece-H3DDPMM10PCSR/203559422

Nominal dimensions of the socket holes are listed below if you wanted to check for your use case. In all instances I added a .4mm offset for fit which works well in my case.

"4mm Diameter"= .464in+"Offset"
"5mm Diameter"= .471in+"Offset"
"6mm Diameter"= .469in+"Offset"
"7mm Diameter"= .472in+"Offset"
"8mm Diameter"= .468in+"Offset"
"9mm Diameter"= .517in+"Offset"
"10mm Diameter"= .574in+"Offset"
"11mm Diameter"= .628in+"Offset"
"12mm Diameter"= .668in+"Offset"
"13mm Diameter"= .706in+"Offset"

"5/32in Diameter"= .466in+"Offset"
"3/16in Diameter"= .466in+"Offset"
"7/32in Diameter"= .466in+"Offset"
"1/4in Diameter"= .470in+"Offset"
"9/32in Diameter"= .470in+"Offset"
"5/16in Diameter"= .467in+"Offset"
"11/32in Diameter"= .516in+"Offset"
"3/8in Diameter"= .573in+"Offset"
"7/16in Diameter"= .626in+"Offset"
"1/2in Diameter"= .690in+"Offset"

"Offset"= .4mm