NO. Specification (mm) Grade Quantity (Lengths) Anchor Certs 1 38mm U2 17 1300kg NK 2 48mm U2 20 2300kg NK 3 58mm U3 22 4250kg NK 4 54mm U3 8 – NK 5 52mm U3 3 – NK 6 78mm U3 3 – NK 7 – – – 7425kg NK