Almond Porcelain Knob Pair. Traditional porcelain doorknobs mounted on a 1/4" square 20TPI threaded spindle, for use with old or new mortise locks or tubular latches that will accommodate a square spindle. Knob base diameter measures .59", knob diameter measures 2-3/8". Base metal finish options: Polished Brass, French Antique Brass, Polished Chrome, Satin Nickel, or Oil Rubbed Bronze. Please view metal finish options below.