The DMM  Boa has undergone some changes. It now has a clean keylock nose but, more importantly, is made with I-beam construction soa 75g  it is almost 25% lighter than the old model with no loss of strength. This makes it just about the best krab for rigging where a  large gate opening and huge capacity are essential. For those contemplating a  big wall the Boa continues to be an excellent haulbag krab.