Round Mortice/Rim Knob SetThese Round mortice rim knob is part of our Blacksmith range. Each one is supplied with a loose collar to allow them to be fitted flushed to the door or can alternatively be used in conjunction with a rim lock. Designed to match our Oval cupboard knobs to create consistency throughout your home. Suitable for use with a multitude of heavy duty locks, latches, and thumbturns for various purposes. The strength of the spring used in heavy duty lock