Leveling glide with elastomer base prevents skidding Double structure of cover/bolt and base allows easy height adjustment without lifting the leg Swivels approximately 10 to compensate for uneven floors Includes slide base KD-555-28(P.667) at no chargeWARNING: This product can expose you to chromium, hexavalent 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.