Flex Stack Multifunctional Case is a durable and versatile storage solution crafted from impact-resistant and UV-resistant plastic. Its quick-release couplings enable you to easily adjust the size of the case system to suit your needs. For enhanced portability, it features 9-inch durable wheels for smooth transportation and a telescoping handle for easy maneuvering. The cases are reinforced with aluminum for added strength, while steel locks ensure secure closure. Each case comes with separate handles for convenient carrying.