Crystal Octagon Knob Eastlake Backplate (Antique Brass Finish) - the crystal knob measures 1 3/8 inches in diameter and have a projection of 1 1/16 inches (32 mm). The knob and backplate are separate pieces - the knob screws into the drawer from behind once the back plate is mounted. The back plate measures 4 1/8 inches long by 1 7/8 inches tall with a center-to-center mounting distance of 2 7/8 inches. Highly detailed brass and crystal component. Mounts horizontally or vertically.