This 42 lbs. square Granite Umbrella Base is made from solid and well-built granite stone, which will ensure your umbrella will remain securely intact with style and practicality. The pole holder is made from durable stainless steel, it can be long time used without rusting easily. The base rod features 2 tightening knobs to secure the umbrella pole well. This base will provide a secure, as well as decorative, umbrella anchor for shaded outdoor dining or relaxing. For use with most styles of standard patio umbrellas. - Solid and well-built granite stone base - Durable stainless steel pole holder - Weather resistant - Heavy-duty, adult assembly required