Black in color, the bronze-constructed Allpoints 1021176 Drain Lock has an outer diameter of 4 11/16" (119 mm) and is nickel-plated. It fits a 3.5" (76mm) drain opening and has a tamperproof design that prevents unauthorized removal. The depth of the lock is 2" (51 mm), and it is installed/removed with a #45 Torx screw.