The From the Anvil Octagonal Mortice/Rim Door Knob Set Black has two loose roses enabling it to be used with a rim lock or mortice lock/latch. The knobs measure at 54mm with 57mm roses and project 63mm from the door. The set comes complete with two knobs, two escutcheons, threaded spindles (for various door thicknesses - up to 60mm) and fixings. Black Door Knobs The door knobs have a black finish - this is baked in a high-temperature oven to give it good durability and can be used internally or externally. To remove dirt deposits, simply wipe over with a lightly oiled cloth from time-to-time...