Ringed Mortice/Rim Knob SetThis Ringed mortice rim knob set is part of our Period collection. The understated Ringed detailing of this mortice rim knob set offers a stylish design that will suit a variety of settings. Suitable for use with a multitude of heavy duty locks, latches, and thumbturns for various purposes. The strength of the spring used in our heavy duty latch will ensure the ring turn returns to its original position. We recommend using a 3", 4", or 5" latch lock.