Heavy duty steel construction. Powder coated. Offset provides increased ground clearance. Fits most tongue and trailer frames. Use for 8", 10", 12", 13", 14" & 15" tires. Fits 4-lug and 5-lug wheels. Fits 4" and 4.5" bolt hole patterns. Mounts on up to 4" x 5" tube. Mounts on up to 3" x 5" channel. Mounts on up to 3" x 5" angle at upright