What secures the hose on the self-locking twin-doughnut hose roll?

In the self-locking twin-doughnut hose roll, the security of the rolled hose is achieved through the loops of the hose itself. This method utilizes the natural twists and bends in the hose to create friction, which helps keep the roll intact and prevents it from unraveling during transport or storage. The design of the twin-doughnut roll allows the loops to interlock in a way that increases stability, making it effective for securing the hose without requiring additional tools or materials.

This technique is preferred in firefighting because it facilitates rapid deployment and retrieval of the hose, while also ensuring it remains compact and manageable. Other methods, such as using a strap or rope, can be effective but may not provide the same level of security or ease of access as utilizing the hose's own structure.