The ISC Offset Oval Karabiner KL321 combines the specification of an Oval with that of a 'D' shape Karabiner. True Ovals are not capable of achieving high breaking loads, as their symmetrical shape shares the load between the spine and the gate of the Karabiner. The weakest part of any Karabiner is the gate and so wherever possible, designers will try to bias the load toward the spine of the Karabiner. This is why 'D' shape Karabiners (typically) give the highest breaking loads.
However, in many industries such as Rope Access & Rope Rescue, the Oval is a popular shape...hence the introduction of this new hybrid KL321 Offset Oval.
We have now developed the process of cold forging, which allows us to offer the common Keylock style (anti-snag) noses on several Karabiners in our range, including the new KL321 Offset Oval.