The SafeLink I-Beam Clamp is a replacement part for the 42" I-Beam Stanchion used with all horizontal lifeline systems. Includes wingnut, washer and cotter pin Adjustable size options Materials: Zinc plated steel rod, forged wing nut Weight: 6.1 lbs. (2.8 kg) Clamp Length: Adjusts from 4" to 18" Weight Capacity: 130-310 lbs. (59-141 kg) OSHA Standards: 1926.502, 1910.140