Non Locking Carabiner. The BiWire is a totally new type of wire gate carabiner. This patent pending design features an outer gate in addition to the normal inner gate. The outer gate protects the inner gate and prevents the rope, or other objects, from opening it. Use the BiWire as an alternative to a non-locking carabiner when you want extra security. Rock Exotica, 6,744 lbs, 1 inch gate opening, Non locking CE approved.