The KL321 Offset Oval SuperSafe Carabiner combines the specification of an Oval with that of a 'D' shape carabiner. 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 carabiner. The weakest part of any carabiner is the gate, so wherever possible, designers try to bias the load toward the spine. This is why 'D' shape carabiners (typically) give the highest breaking loads.However, in many industries, the Oval is a popular shape: hence the introduction of this hybrid KL321 Offset Oval.