DMM Boa HMS Locksafe Carabiner Rope Access References G037AA00 Diameter 8 mm References G037AA00 Diameter 8 mm Weight 60 g Drilling depth 5 cm Drilling diameter 8 mm Shear strength in 50 MPa concrete 15 kN Pull out strength in concrete 50 MPa 12 kN Shear strength in 25 MPa concrete 15 kN Pull out strength in concrete 25 MPa 12 kN Guarantee 3 years Inner Pack Count 1 Product Dimensions : 8 x 4 x 1 inches The Boa is hot forged from 14mm aluminium bar to give it the 30kN major axis rating required for rescue loads DMM's patented Taperlock closing mechanism increases gate push in and cross gate strength using a special flared profile on the nose of the carabiner