Grip 2pc 3/8" Drive Sockets Holder Tray Shallow Deep SAE MM Magnetic Base 67211 Use to keep sockets secure and organized in tool boxes, tool chests, and drawers. Heavy duty ABS construction for strength and durability. Magnetic bottom attaches securely to any ferrous surface. Holds both shallow and deep sockets, SAE from 1/4” to 1” and MM from 6 to 20mm.