These Art Deco Mortice or Rim Knobs are a fantastic example of classic Art Deco styling and have been authentically reproduced. These door knobs come unsprung as standard. So, we recommend using a Heavy Duty or Heavy Sprung lock or latch which is at least 100mm to give a backset of 75mm or more. This is to ensure that the door knob turns properly and returns to the closed position, and that you do not catch your knuckles on the door frame or striker plate. T hey are available for use with either Mortice locks and latches or with Rim locks and latches. Please ensure you order the right one for your door. Made from premium quality brass and handcrafted for us in the West Midlands, using both traditional methods and modern manufacturing processes. Available in a wide range of finishes. You can buy the most popular finishes through our website. If you would like to order one of the other finishes, please contact us. Sold as a Pair and supplied with matching fixings. Always make a small pilot drill hole and use a manual screw driver to avoid damaging screws and finish.