No tools needed for installation. Open or close with a flip of the toe. Fits most popular tub drains (assorted O-rings included), 1-piece construction of Delrin and ABS. Size: Assorted O Rings Finish: Chrome Material: Delrin & ABS This product can expose you to chemicals including acrylonitrile butadiene styrene which is known to the State of California to cause cancer and acrylonitrile butadiene styrene which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. -