The Beal AIR FORCE 3 belay and rappel device is specifically designed for use with half and twin ropes - it allows the leader, when at the stance, to individually belay and lock off one or two seconds. The V-groove offers extra friction to improve rope braking while belaying and optimum energy absorption when catching a leader’s fall. The device is suitable for all ropes with a diameter of 7.3 (BEAL Gully Unicore) - 10.5 mm (BEAL Top Gun Unicore). The AIR FORCE 3 features a small insert hole that allows the rope to be released even when under tension.