Granite Industries Heavy Duty Steel Table Riser/Extender - 6" - 4 Pack Constructed from steel: Unlike PVC or plastic, these extenders are built to last. Constructed from high quality steel these extenders have class leading durability. They are able to stand up to wear and tear that lead most extenders to crack or break. Protective Collar: An inner collar protects the table legs from scratches. Protective Foot: The bottom of the extender has a non-skidding, protective plastic cover. Simple Operation: The table legs sit on a bolt. This allows for any 1" diameter leg to work, bent or straight Save Money and Time: Quickly install the leg and increase the height of any 1" leg diameter table. No need to purchase multiple tables