Facom Plastic Storage Tray of 3/8" Drive Tools (PL.MBOXM) - this tray can be used by itself in your tool box or with plastic case BP.MBOXM for field use of your 3/8" drive tools. The case comes with Facom sets JL.161-3P3, JL.161-3P12, J.161-3P6 and J.161-3P12 (holds 20 tools...sockets, ratchets & drive accessories). It's one of the few trays these days that still has the markings for socket sizes.