The Acre Ring from Dallas Specialty & Mfg. ensures toilet flanges are stabilized if the area surrounding the original flange has rotted away. It is easy to install, ensures the flange is sealed, and eliminates the need to cut out or replace plywood around the flange, preventing the toilet from rocking. The ring has six tabs with screw holes for securing to the floor, and cutout slots for closet bolts. Both screws and bolts are included. It also has inner screw holes for mounting to the flange. 800-222-5644; www.dallasspecialty.com.