3/8" Drive Gridfinity SAE socket holders.
4 Holders for 6 Point, 12 Point, 6 Point Deep and 12 Point Deep Sockets.
SAE sizes ¼, 5/16, 3/8, 7/16, ½, 9/16, 5/8, 11/16, ¾, 13/16, 7/8
These were designed for Cresent Brand Sockets, but may work with other brands.
This is part of a collection that can hold 256 sockets in a Harbor Freight US General Tool Chest in a single draw.