Set includes: Top Organizer Box, Large Tool Box, and Rolling Tool Box for storage and pack out needs Weight Capacity: 250 pounds All Terrain Wheels: 8" wheels with quiet roll rubber liner Metal Telescoping Handle: Allows for easy transport and maneuvering Secure Attachment: Easy One Touch lock & release stacking mechanism provides a secure connection between each Hyper Stack box Rugged Latches and Metal Hinge Pins: Provide maximum durability over the life of the system Ruler Feature: Lid features molded-in ruler for added functionality and a quick measure when needed Heavy Duty: Impact-resistant construction IP65 Rated: Superior protection against dust, water, and job site debris Hyper Stack Compatible: Built with easy slide Hyper Stack cleat system that connect with Hyper Stack hook and rail accessories