Ancra winches comply with DOT, WSTDA-T3 and Canadian Standard 905 regulations.X-Treme Zinc gives your winches a longer working life and better corrosionprotection than zinc-plated, paint or powder coated finishes. Allow for easypositioning in the track, but lock into place when tension is applied to thestrap. For use with Ancra track AI-42357-11, AI-42357-21, AI-49242-10-120 orequivalent. Lighter weight 7mm. WLL: 6,000 lbs./2,730 kg. Sold as Each