Designed for belaying, the Black Diamond GridLock Screwgate Carabiner makes your climb safer. This carabiner isolates your belay loop to prevent shifting and crossloading. With its maximum strength I-beam spine, your rope will feed smoothly, making this carabiner easy to use. DESIGN Climbing carabiner with hot-forged construction Designed for belaying Easy-to-use Isolated belay loop eliminates cross-loading I-beam spine and rounded rope-bearing surface for strength Screwgate sleeve Uses Type H or HMS connector - can be used with Munter Hitch or belay device SPECS Weight: 76g (2.7 oz.) Gate Opening: 21 mm (0.83") Gate Strength (Closed): 22 kN (4,946 lbf) Gate Strength (Open): 8 kN (1,798 lbf) Minor Axis Strength: 7 kN (1,574 lbf) Additional Details Style: BD210278