From the manufacturer

The Gatekeeper is a very easy to use belay/rappel 'biner that keeps the carabiner properly aligned on the belay loop to help prevent cross loading. This carabiner is hot forged with a widened spine to prevent the migration of assisted braking belay devices.

Specifications

• Weights: Screw 2.46 oz. (70 g), Auto 2.8 oz. (79 g)
• Size: 4.6" x 2.5" (118 mm x 64.8 mm)
• Strength: 22 kN (4950 lbf)
• CE/UIAA certified