The Hercules Features The safest and most user – friendly locking mechanism for via ferrata (especially easy to operate with gloves The gate opens by squeezing the back lever and gate together and auto locks when released. ; The keylock nose helps fading snagging. Automatic lock opens by squeezing the carabiner and pulling and pulling, and the gate; Release lever on back is constructed from stainless steel; Major axis (kN): 30 minor axis (kN): 9