Fastlok, Wire Lock Fastlok, Wire Lock- Fast and easy way to create an in-line splice - Body made of cast zinc, with hardened jaws and spring for holding wire- Holding force is close to the full strength of the high tensile wire itself- Excellent performance on tensile strength (≥650 kg or 1,430 lb) - Installed in the same manner as Gripple Fastlok, Wire Lock