Ernst 8452 RD + 8453 RD + 8454 RD + 8458 RD - Socket BOSS High-Density Trays w/two (2) 1/4, 3/8, 1/2, 3/4in Socket Rail Socket each. This combo set also keeps your SAE and METRIC color the same Grippers or order. Organizer System or a simpler Drawer-Management System. The space in your toolbox is limited! With unlimited configurations options, this is the most flexible Socket Rail Socket Organizer for you to design your own system. The benefits of Drawer-Management is clean placement of your tools and less lost. The High-Density Tray holds 30 sockets each (14 on the 3/4in. rails) and allows you to see everything at a glance, rest in your toolbox drawers or on the go!