"These Vestil fork extensions provide the extra support needed to lift long or large objects with a fork truck. U.S.A. Extension Width in. 5 1/2, Load Capacity lbs. 4,000, Product Style Pin lock style, Overall Height in. 2 2/7, Extension Length in. 72, Fits Forks W x H in. 4 x 2, Fork Thickness in. 2. Provide the extra support needed to lift long or large objects with a fork truck Welded steel construction with cast steel tips Pin style operation - simply remove pin and lay extension over fork or drive fork truck into the extension, then re-insert the pin behind the heel of the fork to secure extension Powder-coat yellow finish OSHA regulations require that extensions are no more than 150 of the existing fork length e.g. 48 in. existing forks, the fork extension should not exceed 72 in."