Fork extensions provide the extra support needed to lift long or large objects with a fork truck. All models are designed of a welded steel construction. Steel retaining strap (loop style*) prevents fork extensions from sliding off forks during use. Baked-in powder coat finish for added toughness. OSHA regulations require that extensions are no more than 150% of the existing fork length. (e.g. 48" existing forks, the fork extension should not exceed 72"). Maximum uniform capacity is 4,000 pounds evenly distributed per pair.