The anchor straps come in two different lengths and have a D ring at each end. When you create an attachment to the D rings instead of the webbing there is less of a load put on the gate of the carabiner.
These straps make for swift and sturdy anchors. Rated strength (end to end): 8,775 lbf. (39kN). Basket: 15,750 lbf. (70 kN). Choker: 7875 lbf. (35 kN).