Door Knobs: Quality-crafted door knobs and components made entirely of solid brass with steel working mechanism and our exclusive Renovator's Supply Finish which protects 20-40 times longer than the competition. This black passage set includes two black knobs, brass and steel latch and circular brass backplate with 1/4 in. square spindle. It also has 2 3/8 in. backset. The knobs have a 2 1/4 in. diameter. Does not include privacy button.