What type of roll creates its own carrying loop?

The self-locking twin doughnut roll is notable for its ability to create its own carrying loop, which makes it particularly useful in situations where efficient handling and easy transport of hoses are essential. This type of roll is designed to provide a secure method of storing the hose while also facilitating quick deployment when needed.

The self-locking mechanism ensures that once the roll is secured, it remains tightly coiled without the risk of unraveling, allowing firefighters to transport and manage hoses more effectively while minimizing the chances of tangling. This is crucial in emergency situations where speed and efficiency are paramount. The design contributes to the overall organization and management of firefighting equipment, ensuring that personnel can focus on their tasks rather than struggling with disorganized hoses.

In contrast, the other options do not feature this self-contained loop capability or the same level of efficiency in transport and deployment.