The Milwaukee 48-22-8444 PACKOUT locking security bar unit provides secure, customizable storage within the PACKOUT modular system. It supports up to 50 lbs of tools and equipment and features an impact resistant body designed for harsh jobsite conditions. Internal organization includes metal ball bearing drawer slides and four sets of quick adjust dividers for flexible layout options. Metal reinforced corners increase durability and ensure reliable stacking with all PACKOUT components. The locking security bar adds protection for stored items during transport or staging. Built for professional technicians, the 48-22-8444 enhances tool organization, workflow efficiency and system security.