From the manufacturer

The Black Diamond GridLock Triple Lock carabiner eliminates the dangers of cross-loading and is purpose-built for belaying. 

The intuitive, easy-to-use GridLock isolates the belay loop behind a simple wiregate to keep the carabiner in its proper orientation. Triple Lock action allows for one-handed operation. The GridLock’s horned-spine keeps belay devices in their proper place. Simply put, you'll never have to deal with a shifting, cross-loaded belay carabiner again.

Features

• Small, internal wiregate eliminates cross-loading
• Horned spine keeps belay device in place
• Triple lock action is one-hand-operable

Specifications

• Weight: 90g
• Gate Opening: 22mm
• Minor Axis Strength: 8 kN
• Open Gate Strength: 8 kN
• Major Axis Strength: 26 kN