Double structure of cover/bolt and base allow easy height adjustment without lifting the leg Swivels approximately 10 to compensate for uneven floors 304 stainless steel construction is ideal for humid environments or application where corrosion is an issueWARNING: This product can expose you to chromium, nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65WARNINGs.ca.gov.