Ellis engineers developed the 3 part molded case with 4 sections to fill the needs of customers who require twice the layout area of the standard attache carrying case (over 1300 square inches), but in the same compact size. The 8400-TW is the next generation, offering a telescoping handle and two semi-recessed wheels. The feet are backfilled and capped with metal studs, making them perfect for harsh environments. The 8400TW comes with clear Lexan dividers to keep your contents secure in their foam silhouettes (not provided). Top quality military grade hardware consists of eight spring-loaded butterfly twist latches, two spring-loaded cushioned 90-degree steel handles, four padlock loops and four lid stays.