DMM Boa 30kN Durolock Carabiner - A904 Anti roll out Durolock (Patented) locking mechanism gives extra security when used in close proximity with moving ropes A massive 30kN breaking load I-Beam section for increased strength to weight ratio while only weighing 115 grams Large HMS shape provides increased internal volume and gate clearance of 19mm Anodised to BS EN 7599:2010 AA10 Sealed for corrosion protection