Constructed with Impact-resistant material and rugged latches. Side accessory rail allows attachment of Build-Out accessories. All Tool boxes are IP65 Rated to protect against dust and water. Start building your perfect storage solution with the Husky Build-Out 3-in-1 Tool Box Set. The set includes Tool Case, Large Tool Box, and Rolling Tool Box. Each component secures together with dual lock & release stacking mechanisms for a sturdy connection that disassembles easily. Expand your storage system by connecting hooks and other accessories to the integrated accessory rail. The Husky Build-Out system creates customizable modular storage that gets you and your tools to the job site faster. The system includes tool boxes, organizers, crates, and accessories, all designed to seamlessly secure together in many different configurations. Holding Capacity cu in. Modular Storage Type: Rolling Tool Box. Modular System Type: Husky Connect. Tool Box Type: Modular Tool Box. Tool Storage Product Type: Modular Tool Box. Tools Product Type: Tool Storage. Maximum Handle Length in.