Heavy Duty ABS Plastic : Engineered with high grade impact resistant ABS rails and abrasion resistant clips with steel ball bearings. The socket organizer is built with durability and long-term use in mind. High CapacityHolds up to 86 sockets in two color. This organizer for sockets is equipped with 24 1/2" drive ball bearing clips ,30 3/8" drive ball bearing clips and 32 1/4" drive ball bearing clips that will hold and secure your sockets under heavy conditions. Removable End Cap DesignAdd or remove clips easily to meet your needs for storing multiple sizes of sockets on a single rail. Works With All Brands Of Sockets Like Snap-On, Craftsman, Mac, And Matco Just To Name A Few EASY TO STORE: 14 inch long. Itis easy to mount on a wall vertically or horizontally, set it on your workbench, or store it in a drawer.