Holds 4-lug (4 on 4" bolt pattern) and 5-lug (5 on 4-1/2" bolt pattern) trailer wheels and not compatible with 5 on 4-3/4" or 5 on 5" bolt pattern Mounts on trailer tongues up to 3 inch wide and 5 inch high Angled and raised mount design makes this ideal for boat trailers as well Durable powder coat finish to resist rust and corrosion Zinc plated mounting hardware For use on 10" and 12" utility trailer tires only