SMC CrossOver Screw-Lock Carabiners feature an ergonomic single hand frame geometry for simple single-handed operation. This carabiner has been specially designed for work environment safety compliance. This model features a classic Screw-Lock gate. SMC CrossOver Carabiners are also available with Dual or Triple Auto-Locking sleeves. Keep your mind on the task at hand with this carabiner’s effective, simple usage.