Poplar Long Plate Sprung Door Knob & Thumbturn - Antique BrassOur Poplar design is our take on the classic Victorian beehive knob. Weve streamlined things, giving it a flatter knob and, in this case, a low profile, long backplate and built in thumbturn. Itll work well in period properties with a contemporary edge, or by bringing a traditional touch to new builds. The knob is sprung, which means you dont need to rely on the latchs spring for its movement. Weve opted for a light spring, so it takes very little