A large, asymmetric biner with the safety of a twist lock gate.
Great for belaying with 2 ropes or using with complex anchors.
Forged I-beam construction, slightly curved spine allows wide opening gate
The notchless nose design will not get caught on webbing or bolts. 
Manual locking screwgate features a protective collar that prevents the nose from jamming under load.
Asymmetric shape creates large internal space and wide opening.