Introducing the simplest and fastest tool for connecting and disconnecting large diameter hose (LDH). No more need for a second person, no more fumbling with spanner wrenches, and no more wasting crucial time when establishing a water supply. Second HandsTM enables a single firefighter to easily couple and uncouple LDH, and quickly complete urgent and critical water supply evolutions. Intuitively designed for ease of use, this solid aluminum, maintenance-free tool weighs only five pounds. Simply hold one coupling and place the opposing coupling in Second HandsTM. The tool securely locks the opposing coupling in a stationary position and activates the release lever enabling the firefighter to keep both hands on one coupling, maximizing grip and leverage, to easily connect or disconnect the hose coupling.