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.