From the manufacturer

The Black Diamond GridLock Screwgate 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. 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

Specifications

• Weight: 82 g
• Size Range: One Size
• Gate Opening: 22 mm
• Minor Axis Strength: 8 kN
• Open Gate Strength: 8 kN
• Major Axis Strength: 26 kN
• 96% Aluminum, 6% Steel
• Country of Origin: Taiwan