The SMC CrossOver series aluminum carabiners are the first biner to meet both NFPA G-rating 1983 and ANSI Z359.1 strength requirements. These carabiners feature a new ergonomic single hand frame geometry allowing easy single hand operations. The CrossOvers have been specifically designed to meet all your work environment safety needs. Easy to use Dual or Triple Auto-Locking sleeves allow for single hand operations while working in mission critical environments. A traditional non-ANSI Screw-Lock version is also available.