EUREKA-Outer Dimension: 4.45″ x 2.9″ This aluminum, H.M.S. style carabiner has a Auto-locking gate with a generous opening. Auto-locking decreases the possibility the user will forget to lock the gate and prevents the gate from unlocking from vibrations while working. It is light-weight, strong and versatile which makes it ideal for use in climbing applications. Available in red color. Meets EN 352 standards.