Feature: Universal support is applicable to all axle bolt hubs (5, 6 and 8 lug hubs) Immediately and safely remove the frozen hub assembly without damaging the axle. Mounts to studs using supplied flange nuts，Use with 5 lbs hammer to knock frozen hubs out of axles， saved alot of time and energy. Made of high-quality high-strength steel, and the surface is treated with black anodic oxidation, which is anti-corrosion, anti-impact, strong and durable. The bottom is made of high-quality 3/4″ steel back plate and reinforced percussion plate, long service life .